I've been told some times that I must record my moves in the carbon copy sheet provided by the organizer instead of using my own chess notebooks. Is there any rule preventing me from using my own record sheets?
According to the rules:
8.1.1 In the course of play each player is required to record his own moves and those of his opponent in the correct manner, move after move, as clearly and legibly as possible, in the algebraic notation (Appendix C), on the ‘scoresheet’ prescribed for the competition.
And also important:
8.3 The scoresheets are the property of the organiser of the competition.