ThinkHR has a great article on this requirement: https://www.thinkhr.com/blog/dol-updates-the-employer-chip-notice/
The CHIP notice informs benefits-eligible employees that their state’s CHIP or Medicaid program may offer premium assistance to help them pay for group health coverage at work.
All employers that offer a group health plan providing medical benefits, whether insured or self-funded, must consider the CHIP notice requirement. Each employer then will determine if it must distribute the notice depending on whether any of its employees live in one of the states listed in the notice. Texas is on the list.
The notice must be distributed when employees initially become eligible for the employer’s health plan and then at least once a year thereafter. For convenience, most employers provide the notice at the same time as they distribute new hire materials and annual enrollment materials.
Here’s a link to the DOL model notice: https://www.dol.gov/sites/default/files/ebsa/laws-and-regulations/laws/chipra/model-notice.pdf