Indiana Code Title 22. Labor and Safety § 22-4-5-3

(1) an employee and an employing unit have agreed in a labor contract, that is negotiated on or before May 10, 1987, and any renewals of the contract, to establish a work week that is a different term of seven (7) days than the calendar week;

(2) the employing unit has filed a written notice with the department in the form and manner prescribed by the department stating that a work week other than the calendar week has been established under the labor contract between the employing unit and its employees;  and

(3) the notice has been filed with the department before an employee working on the contractual work week files a claim for unemployment compensation benefits;