(a) All pupils whose primary language is other than English who have not been previously assessed or are new enrollees to the school district shall have their English language skills assessed within 30 calendar days from the date of initial enrollment.

(b) The census of English learners, required for each school district shall be taken in a form and manner prescribed by the State Superintendent of Public Instruction in accord with uniform census taking methods.

(c) The results of the census shall be reported by grade level on a school-by-school basis to the Department of Education not later than April 30 of each year.