Sec. 4. COOPERATION OF TEXAS WATER DEVELOPMENT BOARD. In recognition of the necessity for a coordinated effort at all levels of government, the Texas Water Development Board shall cooperate with the Federal Insurance Administrator of the United States Department of Housing and Urban Development in the planning and carrying out of state participation in the National Flood Insurance Program; provided, however, that the responsibility for qualifying for the National Flood Insurance Program shall belong to any interested political subdivision, whether presently in existence or created in the future.