A county with an approved RAP project may use any other funds available for such project including federal, other state, private, and local funds, provided that the county will be required to use such other funds to match any RATA funds allocated to the project with a minimum of twenty percent other funds in the NWR for projects approved by the CRABoard on and prior to April 30, 2008, and ten percent other funds in the NWR for projects approved thereafter, and ten percent other funds in the PSR, SWR, NER, and SER.