This guide covers retirement benefits and eligibility for law enforcement, custodial officers and parole officers who started work before Sept. This is the public web site for the Houston Police Officers' Pension System (HPOPS).Follow instructions to download, fill out and mail the application to: Harris County Constable Precinct One. 1302 Preston St., 5th Floor. Your agency will then complete the Schedule D, Agency Checklist of Immediate Retirement Procedures, and the. SF 3107-1, Certified Summary of Federal Service,. Retirement planning for law enforcement officers. There are two eligibility requirements: The first being to enter DROP for up to five years and the second is for extending DROP beyond five years. TMRS is a statewide retirement system that provides retirement, disability, and survivor benefits for employees of participating Texas cities. Stationed in postal facilities across the nation, they stand on the frontlines in the fight to protect postal employees, customers, and property. Scroll.