If, not later than the 15th day after the date on which the person receives notice of suspension under Section 524.011 or is presumed to have received notice under Section 524.013, the department receives at its headquarters in Austin, in writing, including a facsimile transmission, or by another manner prescribed by the department, a request that a hearing be held, a hearing shall be held as provided by this subchapter.
Tex. Transp. Code § 524.031