Cal. Bus. & Prof. Code § 2530.6

(b) The number of aides who may be supervised by a licensee shall be determined by the board.

(c) The supervising audiologist or speech-language pathologist shall be responsible for the extent, kind, and quality of services performed by the aide, consistent with the board’s designated standards and requirements.

(d) A speech-language pathology and audiology aide registration shall expire every two years and is subject to the renewal requirements in Article 6 (commencing with Section 2535).

(e) At the time of registration renewal, the speech-language pathologist or audiologist supervising the speech-language pathology or audiology aide shall update the board on the duties the aide performs while assisting the supervisor in the practice of speech-language pathology or audiology, and the training program and assessment methods the supervisor is utilizing to ensure the aide’s continued competency.