Final answer:
The registered representative is not required to provide notice to his employer or receive permission before accepting the position to provide consulting services in the preparation of a valuation textbook.
Step-by-step explanation:
In the scenario described, the registered representative who has been asked to provide consulting services in the preparation of a valuation textbook is not required to provide notice to his employer or receive permission before accepting the position. This is because the project is outside the scope of his regular job duties as a registered representative. However, it is always a good practice to review his employment contract or consult with his employer to ensure there are no conflicts of interest or other company policies that may be applicable.