Original: The premises will be approved for the registration of civil partnerships only and must be regularly available to the public for use for that purpose.
Simplified: The building will be approved for the registration of civil partnerships only and must be regularly available to the public for use to do this.
Simplified: The building will be approved for the registration of civil partnerships only and must be available often to the public for use for that purpose.
Simplified: The building will be approved for the registration of civil partnerships only and must be available to the people to use for that purpose.