All categorical pretreatment standards adopted by the U.S. EPA after the promulgation of this chapter shall be enforceable by the City through this chapter. Where a user, subject to a categorical pretreatment standard, has not previously submitted a data disclosure form as required by section 10-5-15 of this chapter, the user shall file a data disclosure form with the City within one hundred eighty (180) days after the promulgation of the applicable categorical pretreatment standard by the U.S. EPA. In addition, any user operating on the basis of a previous filing of a disclosure statement, shall submit to the City within one hundred eighty (180) days after the promulgation of an applicable categorical pretreatment standard, the additional information required by subsections 10-5-15-2A3, A4, A6 and A10 of this chapter. If deemed necessary by the City, where categorical pretreatment standards are more stringent, the indirect discharge permit will be modified. The user shall be informed of any proposed changes in this chapter at least thirty (30) days prior to the effective date of change. Any changes or new conditions in this chapter shall include a reasonable time schedule for compliance. (1952 Code § 8-14-18)