number of loaded foreign and domestic twenty-foot equivalent units of containerized cargo in 2016, as identified by the U.S. Army Corps of Engineers: Provided further , That the Maritime Administration shall distribute funds provided under this heading as discretionary grants to port authorities or commissions or their subdivisions and agents under existing authority, as well as to a State or political subdivision of a State or local government, a tribal government, a public agency or publicly chartered authority established by one or more States, a special purpose district with a transportation function, a multistate or multijurisdictional group of entities, or a lead entity described above jointly with a private entity or group of private entities: Provided further , That projects eligible for funding provided under this heading shall be either within the boundary of a port, or outside the boundary of a port, and directly related to port operations or to an intermodal connection to a port that will improve the safety, efficiency, or reliability of the movement of goods into, out of, around, or within a port, as well as the unloading and loading of cargo at a port: Provided further , That in awarding grants from funds made available by the second proviso under this heading for the 15 coastal seaports referred to, the Maritime Administration shall give priority consideration for proposed projects that construct treatment facilities defined in section 305.1 of title 7, Code of Federal Regulations, to meet the phytosanitary treatment requirements of sections 305.5 through 305.8 of title 7, Code of Federal Regulations: Provided further , That the Federal share of the costs for which an expenditure is made under this heading shall be up to 80 percent: Provided further , That not to exceed 2 percent of the funds appropriated under this heading shall be available for necessary costs of grant administration: Provided further , That the proceeds of Federal credit assistance under chapter 6 of title 23, United States