Each system must include policies and procedures to ensure, consistent with §§ 303.13(a)(8) (early intervention services), 303.26 (natural environments), and 303.344(d)(1)(ii) (content of an IFSP), that early intervention services for infants and toddlers with disabilities are provided—

(a) To the maximum extent appropriate, in natural environments; and

(b) In settings other than the natural environment that are most appropriate, as determined by the parent and the IFSP Team, only when early intervention services cannot be achieved satisfactorily in a natural environment.