A person authorized by a general permit shall pay an annual waste treatment inspection fee under Texas Water Code (TWC), §26.0291, consistent with §§ 305.501-305.507 of this title (relating to the Waste Treatment Inspection Fee Program) or as specified in the general permit; and may be subject to an annual watershed monitoring and assessment fee under TWC, §26.0135(h), consistent with § 220.21 of this title (relating to Water Quality Assessment Fees) or as specified in the general permit.
30 Tex. Admin. Code § 205.6