The number 706 refers to Form 706 which is used to file the United States Estate (and Generation-Skipping Transfer) Tax Return. Generally, a contract to employ a certified public accountant need not be in writing. However, such contracts often call for services of a highly complex and technical nature, and hence they should be explicit in their terms, and they should be in writing. In particular, a written employment contract is necessary in order to avoid misunderstanding with the employer regarding the amount of the accountant's fee or compensation and the nature of its computation.
This form is a generic example that may be referred to when preparing such a form for your particular state. It is for illustrative purposes only. Local laws should be consulted to determine any specific requirements for such a form in a particular jurisdiction.