After the IEP is developed and placement is determined, the student's teachers are responsible for implementing all educational services, program modifications, or supports as indicated by the individual education plan. Schools are required to have an IEP in effect at the beginning of the school year. Initial IEPs are required to be developed within 30 days after eligibility is determined, and the services specified in the child's IEP are required to be provided as soon as possible after the IEP is developed.