Before doing business in Texas as an independent fire protection sprinkler contractor a person or organisation obtains a certificate of registration from the state fire marshal, and a registered firm may not subcontract any act of a sprinkler contractor to an unregistered firm. The firm keeps a specific physical business location shown on the certificate and posts the certificate conspicuously there. A total change of ownership voids the certificate, with a new application due 14 days before the change; a partial change affecting name, location or mailing address needs a revised certificate; officer changes are reported in writing within 14 days; lost certificates are replaced on written notice and fee; certificates are not transferable. Certificates are typed General (any sprinkler system work), Dwelling (one- and two-family dwelling systems) or Underground Fire Main (sales, installation, maintenance and service, but not planning, of underground piping that is part of a sprinkler system).
The graph holds this control, the 0 it maps to, and the evidence behind each claim, over MCP and REST.