(1) Work performed on public works contracts will not require the payment of overtime rates for the first two hours worked in excess of eight hours per day when the employer and employee voluntarily enter into an agreement wherein the employee will work up to ten hours per day in a four-day week to accomplish forty hours of work.

(2) Recognizing that there may be days when a full ten hours of work is not available, the remainder of the forty hours may be made up on another work day or days within the same work week, except work performed on Saturdays, Sundays, and holidays is subject to the established prevailing overtime provisions for a given trade or occupation, as provided in chapter 39.12 RCW.

(3) For the purpose of this section an agreement must:

(a) Have been authorized by employees who bargained collectively with their employers through representatives of their own choosing; or

(b) Be obtained in writing, signed, and dated by both parties; and

(c) Be entered into individually with each employee; and

(d) Be entered into separately for each public works project, except that an employer, at its option, may obtain an annual authorization; and

(e) State the name of the public works project with specificity; and

(f) Be entered into voluntarily by the employer and employee.

(4) Each employer must retain copies of the individual employee authorization agreements required pursuant to subsection (3) of this section for three years from the date of acceptance of the public works project by the contract awarding agency. Absence of an authorization record for an employee shall be deemed per se evidence of lack of that employee's authorization. Such records are payroll records, subject to the requirements of WAC 296-127-320.

(5) It is prohibited to work more than ten hours in any calendar day on a public works project except in cases of extraordinary emergency, such as danger to life or property.

(6) Notwithstanding the above provisions, overtime rates must be paid for all hours worked in excess of forty hours per week.

(7) This section provides a minimum public works overtime standard, and does not supersede prevailing overtime wage rates established under the authority of chapter 39.12 RCW.