The Verordnung über den Bau und Betrieb der Straßenbahnen (abbreviated BOStrab) is a German

Germany

Germany , officially the Federal Republic of Germany , is a federal parliamentary republic in Europe. The country consists of 16 states while the capital and largest city is Berlin. Germany covers an area of 357,021 km2 and has a largely temperate seasonal climate...

 law governing regulations for tram

Tram

A tram is a passenger rail vehicle which runs on tracks along public urban streets and also sometimes on separate rights of way. It may also run between cities and/or towns , and/or partially grade separated even in the cities...

way, metro

Rapid transit

A rapid transit, underground, subway, elevated railway, metro or metropolitan railway system is an electric passenger railway in an urban area with a high capacity and frequency, and grade separation from other traffic. Rapid transit systems are typically located either in underground tunnels or on...

 and light rail

Light rail

Light rail or light rail transit is a form of urban rail public transportation that generally has a lower capacity and lower speed than heavy rail and metro systems, but higher capacity and higher speed than traditional street-running tram systems...

 operations.

It is not as strict as the Eisenbahn-Bau- und Betriebsordnung

Eisenbahn-Bau- und Betriebsordnung

The Eisenbahn-Bau- und Betriebsordnung or EBO is a German law specifying rules and regulations for railways....

, which governs railway operations; for example the BOStrab does not specify a strict loading gauge to follow.

Some Stadtbahn

Stadtbahn

A ' is a tramway or light railway that includes segments built to rapid transit standards, usually as part of a process of conversion to a metro railway, mainly by the building of tunnels in the central city area....

systems are subject to both BOStrab and EBO regulations as their vehicles use both types of networks.