37 Tex. Admin. Code § 343.672
(a) The facility administrator shall ensure that the educational program provides for at least 180 days of instruction unless:
(b) An education service provider is required to provide a full educational day. An educational day is required to:
Source Note:The provisions of this §343.672 adopted to be effective January 1, 2010, 34 TexReg 7095; amended to be effective January 1, 2015, 39 TexReg 9243.