diff --git a/contrib/src/main/java/org/archive/crawler/prefetch/SourceQuotaEnforcer.java b/contrib/src/main/java/org/archive/crawler/prefetch/SourceQuotaEnforcer.java
new file mode 100644
index 00000000..881f9d59
--- /dev/null
+++ b/contrib/src/main/java/org/archive/crawler/prefetch/SourceQuotaEnforcer.java
@@ -0,0 +1,120 @@
+/*
+ * This file is part of the Heritrix web crawler (crawler.archive.org).
+ *
+ * Licensed to the Internet Archive (IA) by one or more individual
+ * contributors.
+ *
+ * The IA licenses this file to You under the Apache License, Version 2.0
+ * (the "License"); you may not use this file except in compliance with
+ * the License.  You may obtain a copy of the License at
+ *
+ *     http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+
+package org.archive.crawler.prefetch;
+
+import java.util.HashMap;
+import java.util.Map;
+import java.util.Map.Entry;
+
+import org.archive.crawler.prefetch.QuotaEnforcer;
+import org.archive.crawler.prefetch.RuntimeLimitEnforcer;
+import org.archive.crawler.reporting.StatisticsTracker;
+import org.archive.crawler.util.CrawledBytesHistotable;
+import org.archive.modules.CoreAttributeConstants;
+import org.archive.modules.CrawlURI;
+import org.archive.modules.FetchChain;
+import org.archive.modules.ProcessResult;
+import org.archive.modules.Processor;
+import org.archive.modules.fetcher.FetchStatusCodes;
+import org.archive.modules.seeds.SeedModule;
+import org.springframework.beans.factory.annotation.Autowired;
+
+/**
+ * Processor for enforcing quotas by source tag (normally the seed url if
+ * enabled). Should be configured early in {@link FetchChain} in
+ * crawler-beans.cxml. Supports quotas on any of the fields tracked in
+ * {@link CrawledBytesHistotable}. Only takes effect if
+ * {@link SeedModule#getSourceTagSeeds()} (disabled by default) and
+ * {@link StatisticsTracker#getTrackSources()} (enabled by default) are both
+ * enabled.
+ *
+ * @contributor nlevitt
+ * 
+ * @see {@link QuotaEnforcer}
+ * @see {@link RuntimeLimitEnforcer}
+ */
+public class SourceQuotaEnforcer extends Processor {
+
+    protected String sourceTag;
+    public void setSourceTag(String sourceTag) {
+        this.sourceTag = sourceTag;
+    }
+    public String getSourceTag() {
+        return sourceTag;
+    }
+
+    protected Map<String, Long> quotas = new HashMap<String, Long>();
+    public Map<String, Long> getQuotas() {
+        return quotas;
+    }
+    /**
+     * Keys can be any of the {@link CrawledBytesHistotable} keys:
+     * <ul>
+     * <li>{@value CrawledBytesHistotable#NOVEL}
+     * <li>{@value CrawledBytesHistotable#NOVELCOUNT}
+     * <li>{@value CrawledBytesHistotable#DUPLICATE}
+     * <li>{@value CrawledBytesHistotable#DUPLICATECOUNT}
+     * <li>{@value CrawledBytesHistotable#NOTMODIFIED}
+     * <li>{@value CrawledBytesHistotable#NOTMODIFIEDCOUNT}
+     * <li>{@value CrawledBytesHistotable#OTHERDUPLICATE}
+     * <li>{@value CrawledBytesHistotable#OTHERDUPLICATECOUNT}
+     * </ul>
+     */
+    public void setQuotas(Map<String, Long> quotas) {
+        this.quotas = quotas;
+    }
+
+    protected StatisticsTracker statisticsTracker;
+    public StatisticsTracker getStatisticsTracker() {
+        return this.statisticsTracker;
+    }
+    @Autowired
+    public void setStatisticsTracker(StatisticsTracker statisticsTracker) {
+        this.statisticsTracker = statisticsTracker;
+    }
+
+    @Override
+    protected boolean shouldProcess(CrawlURI curi) {
+        return curi.containsDataKey(CoreAttributeConstants.A_SOURCE_TAG)
+                && statisticsTracker.getSourceStats(curi.getSourceTag()) != null;
+    }
+
+    protected void innerProcess(CrawlURI curi) {
+        throw new AssertionError();
+    }
+
+    protected ProcessResult innerProcessResult(CrawlURI curi) {
+        if (!shouldProcess(curi)) {
+            return ProcessResult.PROCEED;
+        }
+
+        CrawledBytesHistotable stats = statisticsTracker.getSourceStats(curi.getSourceTag());
+
+        for (Entry<String, Long> quota: quotas.entrySet()) {
+            if (stats.get(quota.getKey()) >= quota.getValue()) {
+                curi.getAnnotations().add("sourceQuota:" + quota.getKey());
+                curi.setFetchStatus(FetchStatusCodes.S_BLOCKED_BY_QUOTA);
+                return ProcessResult.FINISH;
+            }
+        }
+
+        return ProcessResult.PROCEED;
+    }
+}
diff --git a/contrib/src/main/java/org/archive/modules/deciderules/SeedLimitsEnforcer.java b/contrib/src/main/java/org/archive/modules/deciderules/SeedLimitsEnforcer.java
deleted file mode 100644
index b00d61f4..00000000
--- a/contrib/src/main/java/org/archive/modules/deciderules/SeedLimitsEnforcer.java
+++ /dev/null
@@ -1,101 +0,0 @@
-/*
- * This file is part of the Heritrix web crawler (crawler.archive.org).
- *
- * Licensed to the Internet Archive (IA) by one or more individual
- * contributors.
- *
- * The IA licenses this file to You under the Apache License, Version 2.0
- * (the "License"); you may not use this file except in compliance with
- * the License.  You may obtain a copy of the License at
- *
- *     http://www.apache.org/licenses/LICENSE-2.0
- *
- * Unless required by applicable law or agreed to in writing, software
- * distributed under the License is distributed on an "AS IS" BASIS,
- * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
- * See the License for the specific language governing permissions and
- * limitations under the License.
- */
-
-package org.archive.modules.deciderules;
-
-import org.archive.crawler.prefetch.QuotaEnforcer;
-import org.archive.crawler.prefetch.RuntimeLimitEnforcer;
-import org.archive.crawler.reporting.StatisticsTracker;
-import org.archive.crawler.util.CrawledBytesHistotable;
-import org.archive.modules.CoreAttributeConstants;
-import org.archive.modules.CrawlURI;
-import org.springframework.beans.factory.annotation.Autowired;
-
-/**
- * DecideRule that rejects any CrawlURI with {@code sourceTag} matching the
- * configured {@code seed}, if more than {@code maxBytesDownload} bytes or
- * {@code maxDocumentsDownload} urls have been downloaded from the same source
- * seed.
- * 
- * @contributor nlevitt
- * 
- * @see {@link QuotaEnforcer}
- * @see {@link RuntimeLimitEnforcer}
- */
-public class SeedLimitsEnforcer extends DecideRule {
-
-    private static final long serialVersionUID = 1l;
-
-    private String seed;
-    public void setSeed(String seed) {
-        this.seed = seed;
-    }
-    public String getSeed() {
-        return seed;
-    }
-
-    protected Long maxBytesDownload;
-    public Long getMaxBytesDownload() {
-        return maxBytesDownload;
-    }
-    public void setMaxBytesDownload(Long maxBytesDownload) {
-        this.maxBytesDownload = maxBytesDownload;
-    }
-
-    protected Long maxDocumentsDownload;
-    public Long getMaxDocumentsDownload() {
-        return maxDocumentsDownload;
-    }
-    public void setMaxDocumentsDownload(Long maxDocumentsDownload) {
-        this.maxDocumentsDownload = maxDocumentsDownload;
-    }
-
-    protected StatisticsTracker statisticsTracker;
-    public StatisticsTracker getStatisticsTracker() {
-        return this.statisticsTracker;
-    }
-    @Autowired
-    public void setStatisticsTracker(StatisticsTracker statisticsTracker) {
-        this.statisticsTracker = statisticsTracker;
-    }
-
-    @Override
-    protected DecideResult innerDecide(CrawlURI curi) {
-        if (!curi.getData().containsKey(CoreAttributeConstants.A_SOURCE_TAG)) {
-            return DecideResult.NONE;
-        }
-        CrawledBytesHistotable stats = statisticsTracker.getSourceStats(curi.getSourceTag());
-        if (stats == null) {
-            return DecideResult.NONE;
-        }
-
-        if (maxBytesDownload != null
-                && stats.get(CrawledBytesHistotable.NOVEL) >= maxBytesDownload) {
-            return DecideResult.REJECT;
-        }
-
-        if (maxDocumentsDownload != null
-                && stats.get(CrawledBytesHistotable.NOVELCOUNT) >= maxDocumentsDownload) {
-            return DecideResult.REJECT;
-        }
-
-        return DecideResult.NONE;
-    }
-
-}