The custodian is informed that the date indicated on the registration form represents the commencement date of the child's enrolment in the nursery. The duration of participation is calculated from this date, regardless of whether the child consistently attended the nursery or whether the custodian neglected to ensure their regular attendance. The nursery administration can absolve itself of this responsibility by obtaining a formal declaration from the legal custodian, affirming that the responsibility lies solely with them, and not with any other party.