From the FAA:
The Dynamic Regulatory System (DRS) combines more than 65 document types from more than a dozen different repositories into a single searchable application. This comprehensive knowledge center centralizes the FAA’s aviation safety guidance material from the Flight Standards Information System (FSIMS) and the agency’s Regulatory Guidance System (RGL).
Each guidance document includes a link to the Code of Federal Regulations provision on which the document is based. DRS contains more than 2 million regulatory guidance documents, which can be browsed or searched. A search engine allows for basic or advanced searches and different ways to sort and view the results. The system includes pending and current versions of all documents along with their revision history. Information in the DRS is updated every 24 hours.
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