I'm not sure the BICSI TDDM is going to specify that for you, here are a couple thoughts.
Where I live, we are required to perform installations under the National Electrical Code. Which means our installers are all licensed, and at the conclusion of the installation we have the project inspected by the electrical inspector, who signs off our permit.
I don't have the time to look it up tonite, but I believe the latest NEC requires the removal of abandoned wire when it is replaced. If the unused wire is in a position to be reused, we coil it and label it at both ends. This shows the wire is not 'abandoned' and we don't have to remove it. If it isnt going to be reused, we do pull it out or cut it back to where it is not accessible. My understanding for the ruling was that there are many installations where the load on the suspended ceiling from early (improper) cabling is to the point that the ceilings could fall. I've seen several like this. So, in an effort to clean things up, the unused cabling is removed.
I don't know how you guys do work, but I generally cover this kind of question in the bid or RFP for the job. It is only my opinion, based on my experience and education...I am always willing to learn, educate me!
Daron J. Wilson, RCDD
daron.wilson@lhmorris.com