The initiating agency must take into account, during the development stage, the time required for processing a proposal. Proposals must be developed early enough to account for the time required to process through Army channels as well as the following FAA time requirements:
a. Nonrulemaking proposals usually require the FAA a minimum of 6 months to process from the date received.
b. Rulemaking proposals usually require the FAA a minimum of 12 months to process from the date received.
c. Controversial proposals, both rulemaking and nonrulemaking, may take several years to process.
d. Additional information is provided in FAAH 7400.2, part 7, chapter 29, section 2.