The official requirement is the last 90 days (about 1 1/2" of your hair). Of course to be absolutely sure, the farther in the past your usage is, the better/"safer" your test results will be.
You made the right assumption about legality. States are setting their own rules, but in the Federal book, marijuana is still illegal, so the FEDERAL Motor Carriers Safety Administration will follow Federal rules.
Dm:
Dispatcher, Fleet Manager, Driver Manager
The primary person a driver communicates with at his/her company. A dispatcher can play many roles, depending on the company's structure. Dispatchers may assign freight, file requests for home time, relay messages between the driver and management, inform customer service of any delays, change appointment times, and report information to the load planners.
The official requirement is the last 90 days (about 1 1/2" of your hair). Of course to be absolutely sure, the farther in the past your usage is, the better/"safer" your test results will be.
You made the right assumption about legality. States are setting their own rules, but in the Federal book, marijuana is still illegal, so the FEDERAL Motor Carriers Safety Administration will follow Federal rules.
Dm:
Dispatcher, Fleet Manager, Driver Manager
The primary person a driver communicates with at his/her company. A dispatcher can play many roles, depending on the company's structure. Dispatchers may assign freight, file requests for home time, relay messages between the driver and management, inform customer service of any delays, change appointment times, and report information to the load planners.