(1) No person under sixteen years of age may be employed in house-to-house sales unless the department grants a variance permitting specific employment under criteria adopted by department rule.

(2) No person sixteen or seventeen years of age may be employed in house-to-house sales unless the employer:

(a) Obtains and maintains a validated registration certificate issued by the department. Application for registration shall be made on a form prescribed by the director, which shall include but not be limited to:

(i) The employer's name, permanent address, and telephone number;

(ii) The employer's social security number and industrial insurance number or, in lieu of these numbers, the employer's unified business identifier account number; and

(iii) A description of the work to be performed by persons aged sixteen or seventeen and the working conditions under which the work will be performed;

(b) Provides each employee sixteen or seventeen years of age, before beginning work, an identification card in a form prescribed by the director. The card shall include, but not be limited to, a picture of the employee, the employee's name, the name and address of the employer, a statement that the employer is registered with the department of labor and industries, and the registration number. The person employed in house-to-house sales shall show the identification card to each customer or potential customer of the person;

(c) Ensures supervision by a person aged twenty-one years or over during all working hours, with each supervisor responsible for no more than five persons; and

(d) If transporting an employee sixteen or seventeen years of age to another state, obtains the express written consent of the employee's parent or legal guardian.

(3) An employer may not employ a person sixteen or seventeen years of age in house-to-house sales after the hour of nine p.m.

(4) The department shall adopt by rule procedures for the renewal, denial, or revocation of registrations required by this section.