The answer is found in s27 of the Care Act; and in the Guidance. Section 27 is what makes the duty to review a statutory duty.
Then there’s the whole of chapter 13 about review. https://www.gov.uk/government/publications/care-act-statutory-guidance/care-and-support-statutory-guidance#Chapter13
There’s no time limit for it, but since it should be done annually, 10 months and forgetting what’s already been asked is way too long.
