31 Tex. Admin. Code § 25.4
The agency shall use the following formula for calculating the amount of funds available to each city and county for the fiscal year for which they seek reimbursement. Seventy-five percent of funds available for distribution shall be allocated by determining each participant's proportionate share of total participant expenditures during the two fiscal years preceding the year for which participant is applying for reimbursement. Twenty-five percent of the funds available for distribution shall be allocated by determining each participant's proportionate share of total linear footage of gulf beach which the participants will clean and maintain pursuant to project agreements authorized in § 25.11 of this title (relating to Project Agreement).
31 Tex. Admin. Code § 25.4