(a) Respite care and services for families may be provided as needed which may include periods of less than 24 hours. Respite care and services for foster families and foster children must be provided for periods of at least 24 hours.

(b) Respite care and services for foster families may be provided for up to a maximum of 21 consecutive days at a time.

(c) Respite care and services for families may be provided for families may be provided for up to a maximum of 21 consecutive days at a time, except that where a parent is participating in a substance abuse detoxification treatment program, respite care and services for families may be provided for up to a maximum of 30 consecutive days at a time.

(d) A period of seven consecutive days must elapse before respite care and services may be provided to a family or foster family which has previously received such care and services.

(e) Respite care and services may be provided to each family or foster family for a maximum of seven weeks in any calendar year.