When filling out a solo cross country flight endorsment, are we allowed to put in the limitations and conditons sections, something along the lines of, "flight subject to my approval by phone call". Instead of filling out the endorsement on the same say as the students flight?? The reason i ask is that I have another job and not always available to meet a student at the airport before their flight. I cant find a reg. specifing that i can or cant. Obviously I would check weather, notams, tfrs, etc...before giving the approval just as i would if i was there......Thanks..... PLEASE list any reg. refereance with answers..