a deferred disposition under section 1901, the court may order sentencing deferred to a date certain or determinable and impose requirements upon the person, to be in effect during the period of deferment, considered by the court to be reasonable and appropriate to assist the person to lead a law-abiding life. The court-imposed deferment requirements must include a requirement that the person refrain from criminal conduct and may include a requirement that the person pay to the appropriate county an administrative supervision fee of not more than $50 per month, as determined by the court, for the term of the deferment. In determining the amount of the fee, the court shall take into account the financial resources of the person and the nature of the burden its payment imposes. In exchange for the deferred sentencing, the person shall abide by the court-imposed deferment requirements. Unless the court orders otherwise, the requirements are immediately in effect.