AGENCY: Federal Energy Regulatory Commission.

ACTION: Notice of proposed rulemaking. SUMMARY: The Federal Energy Regulatory Commission (Commission) proposes to revise its regulations regarding when the Commission will commence assessing annual charges to hydropower licensees and exemptees, other than state or municipal entities, with respect to licenses and exemptions authorizing unconstructed projects and new capacity. Specifically, the Commission proposes to commence assessing annual charges two years from the effective date of the project license, exemption, or amendment authorizing new capacity, rather than on the date that project construction starts. The proposed revisions will provide administrative efficiency and promote certainty among licensees, exemptees, and Commission staff as to when annual charges will commence. DATES: Comments are due [Insert date sixty (60) days after publication in the FEDERAL REGISTER]. ADDRESSES: Comments, identified by docket number, may be filed in the following ways: Docket No. RM15-18-000 - 2-• Electronic filing throug