Final answer:
Exceptions to the 'must be written' control script regulations primarily include emergency situations, where a written script cannot be provided immediately.
Step-by-step explanation:
When it comes to control script regulations, there are certain exceptions where a written prescription is not required. The most common exception occurs in emergency situations where there is no opportunity to provide a written script due to the immediate nature of the treatment needed. However, this is generally followed by a written prescription as soon as possible thereafter. In contrast, routine daily procedures and all interactions with clients generally do require written control scripts to maintain accurate records and ensure compliance with regulatory standards. Therefore, the correct answer is A) Emergency situations are the exception to the 'must be written' control script regulations.