Final answer:
Commercial Air Service Standards are detailed in CAR 725, part of the Canadian Aviation Regulations, which are essential for the safe operations of commercial air services in Canada.
Step-by-step explanation:
The question pertains to the regulations governing commercial air service standards. Commercial Air Service Standards are found in CAR 725, not CAR 706, CAR 726, Airworthiness Manual Chapter 563, or CAR 625, Appendix B. The acronym CAR stands for Canadian Aviation Regulations, and these regulations are essential for determining the guidelines that commercial air services must adhere to for safe operation and maintenance of aircraft in Canada. It's important for those involved in aviation to be familiar with these standards to ensure compliance with the regulations laid out by Transport Canada.