Mo. Code Regs. tit. 10 § 20-8.021Download PDFCurrent through Register Vol. 49, No. 21, November 1, 2024.Section 10 CSR 20-8.021 - Individual Sewage Treatment Systems Standards(Rescinded March 30, 1999)10 CSR 20-8.021 AUTHORITY: section 644.026, RSMo 1986. Original rule filed Nov. 14, 1988, effective 4/15/1989. Rescinded: Filed July 13, 1998, effective 3/30/1999.