The director of the department of conservation and natural resources is authorized to adopt by rule, pursuant to chapter 30.82 SCC, a Snohomish County Drainage Manual, to be known as the "Drainage Manual." The version of the Drainage Manual in effect on January 30, 2021, will remain in effect until the director of the department of conservation and natural resources adopts a new or updated Drainage Manual. The Drainage Manual shall provide detail and specificity regarding the requirements of chapters 30.63A and 30.63B SCC. When BMPs are required by this chapter, they shall comply with the Drainage Manual. (Added by Amended Ord. 10-026, June 9, 2010, Eff date Sept. 30, 2010; Amended by Ord. 15-102, Jan. 11, 2016, Eff date Jan. 22, 2016; Amended by Amended Ord. 20-081, Jan. 20, 2021, Eff date Jan. 30, 2021).