Any written demand for a surgical operation under Texas Civil Statutes, Article 8306, §12e, or any application for reduction or suspension of compensation pursuant to Article 8307, §4, must be filed with the board at least seven calendar days prior to the date of hearing. However, where good cause for waiving strict compliance is approved by the board, parties may file demand for or tender of surgery on or before the scheduled date of hearing.
28 Tex. Admin. Code § 42.90