Notwithstanding any other law, a member of the legislature or a specific-purpose committee or legislative caucus supporting or assisting the member during an impeding absence may not knowingly:
(1) accept political contributions, and shall refuse any political contributions received, that in the aggregate from a single person exceed the per diem set by the Texas Ethics Commission for each day of a regular or special legislative session under Section 24a(e), Article III, Texas Constitution; or
(2) make a political expenditure for travel, food, or lodging expenses in connection with the member's impeding absence.