(a) Except as provided by this section, in this chapter "business day" means a day other than:
(1) a Saturday or Sunday;
(2) a national holiday under Section 662.003(a); or
(3) a state holiday under Section 662.003(b).
(b) The fact that an employee works from an alternative work site does not affect whether a day is considered a business day under this chapter.
(c) An optional holiday under Section 662.003(c) is not a business day of a governmental body if the officer for public information of the governmental body observes the optional holiday.
(d) A holiday established by the governing body of an institution of higher education under Section 662.011(a) is not a business day of the institution of higher education.
(e) The Friday before or Monday after a holiday described by Subsection (a)(2) or (3) is not a business day of a governmental body if the holiday occurs on a Saturday or Sunday and the governmental body observes the holiday on that Friday or Monday.
(f) Subject to the requirements of this subsection, a governmental body may designate a day on which the governmental body's administrative offices are closed or operating with minimum staffing as a nonbusiness day. The designation of a nonbusiness day for an independent school district must be made by the board of trustees. The designation of a nonbusiness day for a governmental body other than an independent school district must be made by the executive director or other chief administrative officer. A governmental body may designate not more than 10 nonbusiness days under this subsection each calendar year.