The contract for work and materials may not be executed before the fifth calendar day after the owner makes written application for any extension of credit for the work and materials except as provided in §152.13. To count the five days, the day after the application for extension of credit is made is day one. If the fifth calendar day falls on a Sunday or federal legal public holiday, then the contract for work and materials may not be executed until the next calendar day that is not a Sunday or federal legal public holiday.
7 Tex. Admin. Code § 152.9