1. Short title This Act may be cited as the National Oceans and Coastal Security Improvements Act of 2019 . 2. Improvements to the National Oceans and Coastal Security Act (a) Definition of tidal shoreline refined Section 902 of the National Oceans and Coastal Security Act ( 16 U.S.C. 7501 ) is amended— (1) by amending paragraph (7) to read as follows: (7) Tidal shoreline The term tidal shoreline means a tidal shoreline or a Great Lake shoreline as such terms are used in section 923.110(c)(2)(i) of title 15, Code of Federal Regulations, or a similar successor regulation. ; and (2) by adding at the end the following: (8) Indian Tribe The term Indian Tribe has the meaning given that term in section 4 of the Indian Self-Determination and Education Assistance Act ( 25 U.S.C. 5304 ). . (b) Improvements to National Oceans and Coastal Security Fund (1) Establishment of fund required Subsection (a) of section 904 of such Act ( 16 U.S.C. 7503 ) is amended by inserting and jointly manage after establish . (2) Deposits Paragraph (1) of subsection (b) of section 904 is amended to read as follows: (1) In general There shall be deposited into the Fund, which shall constitute the assets of the Fund, amounts as follows: (A) Amounts transferred to the Fund under section 908. (B) Such other amounts as may be appropriated or otherwise made available to carry out this Act. . (3) Expenditures Strike subsection (d) of section 904 and insert the following: (d) Expenditure (1) Of the amounts deposited into the Fund for each fiscal year, if those funds are equal to or greater than $100,000,000— (A) not more than 80 percent may be used for the award of grants under subsection (b) of section 906; (B) not more than 20 percent may be used for the award of grants under subsection (c) of such section