| 2003 Act | Railways and Transport Safety Act 2003 |
| 2003 Act | Police and Fire Reform (Scotland) Act 2012 |
| 2012 Act | The Police and Fire Reform (Scotland) Act 2012 |
| BTP | The British Transport Police Force (established by section 20 of the Railways and Transport Safety Act 2003) and often simply referred to as the British Transport Police |
| BTPA | The British Transport Police Authority (established by section 18 of the Railways and Transport Safety Act 2003) |
| Police Scotland | The Police Service of Scotland (established by section 6 of the 2012 Act) In the 2012 Act, Police Scotland is referred to as the “Police Service” |
| PSA | Police services agreement (see section 33 of the Railways and Transport Safety Act 2003) |
| Railway operator | A person (which in this context can include an individual, company or organisation) who has the management or control, or participation in the management or control of all or part or an aspect of a railway or railway property. (See section 1, inserted section 85M) |
| RPA | Railway policing agreement (see section 1 of the Act, inserted section 85A) |
| SPA | The Scottish Police Authority (established by section 1 of the 2012 Act)In the 2012 Act, the SPA is referred to as “the Authority” |