include specific emergency response plans for the threats identified in assessments prepared pursuant to subsection (a). (4) Periodic review and resubmission Each community water system submitting a plan pursuant to paragraph (1) shall review, revise as necessary, and resubmit such plan not less often than every 5 years. (5) Guidance Not later than one year after the date of enactment of the Safe Drinking Water Act Amendments of 2017 , the Administrator shall provide guidance to community water systems for the preparation of plans under this subsection. (c) Technical assistance and grants (1) In general The Administrator shall establish and implement a program, to be known as the Drinking Water Infrastructure Resiliency and Sustainability Program, under which the Administrator may award grants in each of fiscal years 2018 through 2022 to owners or operators of community water systems for the purpose of increasing the resiliency or adaptability of the community water systems to threats identified pursuant to subsection (a). (2) Use of funds As a condition on receipt of a grant under this section, an owner or operator of a community water system shall agree to use the grant funds exclusively to assist in the planning, design, construction, implementation, operation, or maintenance of a program or project consistent with a plan developed pursuant to subsection (b). (3) Priority (A) Water systems at greatest and most immediate risk In selecting grantees under this subsection, the Administrator shall give priority to applicants that are owners or operators of community water systems that are, based on the best available research and data, at the greatest and most immediate risk of facing significant negative impacts due to threats described in subsection (a)(2). (B) Goals In selecting among applicants described in subparagraph (A), the Administrator shall ensure that, to the maximum extent practicable, the final list of applications funded for each year includes a substantial number that propose to use innovative