Section 449. Effective date of order of support

1. Any order of spousal
  support made under this article shall be effective as of the date of the
  filing of the petition therefor, and any retroactive amount  of  support
  due  shall  be  paid  in  one  sum  or periodic sums, as the court shall
  direct, to the petitioner, to the custodial parent or to third  persons.
  Any  amount of temporary support which has been paid shall be taken into
  account in calculating any amount of retroactive support due.
    2. Any order of  child  support  made  under  this  article  shall  be
  effective  as  of  the earlier of the date of the filing of the petition
  therefor, or, if the children for whom support is sought are in  receipt
  of  public  assistance,  the date for which their eligibility for public
  assistance was effective. Any retroactive amount of support due shall be
  support arrears/past-due support  and  shall  be  paid  in  one  sum  or
  periodic  sums,  as  the  court  shall direct, to the petitioner, to the
  custodial parent or to third persons. Any amount  of  temporary  support
  which  has  been  paid  shall  be  taken into account in calculating any
  amount of retroactive support due. In addition, such  retroactive  child
  support  shall  be  enforceable in any manner provided by law including,
  but not limited to, an execution for  support  enforcement  pursuant  to
  subdivision  (b)  of  section  fifty-two  hundred forty-one of the civil
  practice law and rules.