The following regulations contained in 40 Code of Federal Regulations, which are in effect as of the date of Texas pollutant discharge elimination system (TPDES) program authorization, as amended, are adopted by reference:(1) Part 122, Subpart B--Permit Applications and Special National Pollutant Discharge Elimination System (NPDES) Program Requirements, §122.21(m), providing requirements for variance requests by nonpublicly owned treatment works;(2) Part 122, Subpart B--Permit Applications and Special NPDES Program Requirements, §122.21(n), providing requirements for various requests by publicly owned treatment works (POTWs);(3) Part 122, Subpart C--Permit Applications and Special NPDES Program Requirements, §122.21(o), providing requirements for expedited variance procedures and time extensions;(4) Part 124, Subpart D--Specific Procedures Applicable to NPDES Permits, §124.62, providing decision-making procedures for variances.