NHRA line lock rules

[NVRL8]

Is there anything in the NHRA rules regarding placement of a line lock (specifically before or after the proportioning valve)? I want to install one, but the one I go with may depend on the answers you guys give me. Don't want to get tech'd for a small oversight such as this.

Thanks

 

[Chuck Leeper]

General regulation state: "if the system contains a differential pressure switch, the line loc must have the solenoid installed after the differential switch.

 

[NVRL8]

Exactly what I was looking for. Thanks.