Conn. Agencies Regs. § 21-82-3
If the ground upon which a mobile manufactured home is to be situated is not level, then the owner shall provide either fill or adequate shoring to facilitate the leveling of the mobile manufactured home to keep it from tilting. Such service or maintenance shall be provided immediately upon the installation of a mobile manufactured home on a park lot or when an unlevel condition arises which potentially effects the safety and welfare of the resident or when physical damage may result to the mobile manufactured home. If a tilting condition occurs, due to the ground heaving and settling due to frost conditions, then such service or maintenance shall not be required unless said tilting condition remains permanent.
Conn. Agencies Regs. § 21-82-3