Whenever the municipality determines that an emergency exists as provided in § 50.65, outdoor water use within the municipality water system shall be regulated as follows:
(A) Residential lawn watering is prohibited between the hours of 10:00 p.m. and 6:00 a.m.
(B) Residential lawn watering during permitted hours will be conducted with no more than two sprinklers or 50-foot soaker hoses and hose diameter shall not exceed five-eighths inch.
(C) No watering shall be conducted with an open hose.
(D) Residential users with underground sprinkling systems and commercial and public water systems shall be regulated by the municipal water department.