any such limitation is not more stringent than the standards adopted by the International Civil Aviation Organization. . 302. Frequent and chronic coastal flooding mitigation and adaptation infrastructure projects The Coastal Zone Management Act of 1972 ( 16 U.S.C. 1451 et seq.) is amended by redesignating sections 318 and 319 as section 320 and 321, and by inserting after section 317 the following: 318. Frequent and chronic coastal flooding mitigation and adaptation infrastructure projects (a) In general The Secretary may make grants to State and local governments and federally recognized Indian Tribes for frequent and chronic coastal flooding mitigation and adaptation infrastructure projects. (b) Authorized uses Amounts provided as a grant under this section may be used for any of the following: (1) Adaptation of existing infrastructure, including enhancements to both built and natural environments. (2) Maintenance and updating of existing frequent and chronic coastal flood risk reduction infrastructure, such as gravity drainage structures, road elevation, bulkheads, gates, and floodwalls. (3) Increasing waterfront resilience to frequent and chronic coastal flooding, including (as combined or separate projects)— (A) the creation of bulkheads, levees, and living shorelines