It is not intended by the chapter to repeal, abrogate, annul, impair or interfere with any existing easements, covenants, deed restrictions, agreements, rules, regulations or permits previously adopted or issued pursuant to law. However, whenever this chapter imposes greater restrictions, the provisions of this chapter shall govern. The provisions of the C-1 Conservancy District shall supersede all provisions of any other municipal zoning district except where another municipal zoning district is more restrictive, in accordance with § 61.351(4)(b), Wis. Stats.