I think COTA expectations will vary by state s well as your expereice working in the schol. I work in the school system and we have a COTA who has worked here for almost 20 years and is fantastic. She is not allowed to give our assessments because she can not 'qualify' a students for services. She can however carry out therapy, write porgress notes, bill Medicaid and attend annual IEP meetings. She also meets once a week with the OTs to discuss therapy plans and interventin stratagies.
She does not do any of the consult work in the district per our Director of Sped, but she legally could.