1. Alternative procedures In providing assistance pursuant to section 428 of the Robert T. Stafford Disaster Relief and Emergency Assistance Act ( 42 U.S.C. 5189f ), for critical services as set forth in section 406(a)(3) for the duration of the recovery for incidents DR–4336–PR, DR–4339–PR, DR–4340–USVI, and DR–4335–USVI, the Administrator of the Federal Emergency Management Agency shall— (1) revise the guidance definitions for application of section 20601 of the Bipartisan Budget Act of 2018 ( Public Law 115–123 ) to provide explicitly that multicomponent systems or facilities be inspected, evaluated, and estimated as a single project rather than requiring every component of the system to be inspected, evaluated, and estimated; (2) at the request of an applicant, put into effect a procedure for evaluation and authorization of projects through professionally licensed engineers, as provided by subparagraphs (F) and (G) of subsection (e)(1) of section 428 of the Robert T. Stafford Disaster Relief and Emergency Assistance Act; and (3) extend the deadline for the presentation of cost estimates and project worksheets under such incidents until October 31, 2021. 2. Assistance throughout recovery Section 20601 of the Bipartisan Budget Act of 2018 ( Public Law 115–123 ) is amended by striking may and inserting shall . 3. Timely basis for payment and reimbursement Section 428(c) of the Robert T. Stafford Disaster Relief and Emergency Assistance Act ( 42 U.S.C. 5189f ) is amended— (1) in paragraph (3), by striking and ; (2) in paragraph (4), by striking the period and inserting ; and