English: The senator is the author of Senate Bill No. 131 or the "Civil Service Security of Tenure Act" that ensures security of tenure for casual and contractual employees of the government who have rendered exemplary service.
Filipino: Si Villanueva ang may-akda ng Senate Bill No. 131 na "Civil Service Security of Tenure Act" na nagkakaloob ng security of tenure para sa mga kaswal at kontraktwal na empleyado ng gobyerno na bukod-tangi at huwaran sa kanilang paninilbihan.