A church, religious nonprofit entity, or religious nonprofit school that has been operating a day care center or preschool program without a license prior to March 21, 2018 that chooses to become a licensed day care center under this chapter shall have 90 days from March 21, 2018 to come into compliance with all licensing requirements of this chapter and related rules adopted by the department, except the church, religious nonprofit entity, or religious nonprofit school shall not be required to meet minimum standards for licensed day care centers or nighttime centers relating to physical building design, size, and fixtures for existing construction.