As part of these agreements, it is necessary to supplement the guidelines and procedural documents relating to the development of C-M agreements between TxDOT and various railway companies, including: TxDOT regularly enters into construction and maintenance contracts (C-M) with railway companies that issue the licence and authorisation to TxDOT to carry out rail work before the sages. A separate agreement on the contractor`s right of entry is then concluded between the contractor and the railway company to allow the holder to have a priority right over the railways. The authorisation procedure for requests for seismic and vibrosis investigations, film productions and other projects for the temporary use of railway property is as follows: when a contractor is charged by the taker with the execution of one of the activities agreed under the entry delegate, that part must complete and return the holder`s support form and submit it. , accompanied by an administrative fee of $500 and a copy of its general liability insurance certificate. which corresponds to the coverages indicated, as indicated. in the licensing agreement. Railway liability insurance must be obtained from the licensee or its owner.