(i) Bonds issued, or
  (ii)  Bonds issued to redeem notes, certificates or other evidences of
temporary indebtedness issued prior to January first,  nineteen  hundred
thirty-nine.
  * 2.  Notwithstanding  the  provisions  of  subdivision  one  of  this
paragraph and subdivision three of paragraph a of  this  section,  bonds
may  be refunded and the refunding bonds may be sold at either public or
private sale where the present value of the refunding bonds is less than
the present value of the bonds to be  refunded  computed  in  accordance
with subparagraph (a) of subdivision two of paragraph b of section 90.10
of  this title and where the issuer complies with all other requirements
of such section; provided, however, that if such bonds are being sold to
the New York state environmental facilities  corporation  in  connection
with  a  hardship state revolving fund financing at a rate equal to zero
percent,  compliance  with  subparagraph  (a)  of  subdivision  two   of
paragraph  b  of  section  90.10  of  this  title shall not be required;
provided further, however, that if the bonds to be refunded  are  to  be
redeemed or paid on the same date as the refunding bonds are issued, the
issuer  need  not  comply  with  the provisions of section 90.10 of this
title relating to the  escrow  of  the  proceeds  of  the  sale  of  the
refunding bonds.
  * NB Effective until September 30, 2023
  * 2.  Notwithstanding  the  provisions  of  subdivision  one  of  this
paragraph and subdivision three of paragraph a of  this  section,  bonds
may  be refunded and the refunding bonds may be sold at either public or
private sale where the present value of the refunding bonds is less than
the present value of the bonds to be  refunded  computed  in  accordance
with subparagraph (a) of subdivision two of paragraph b of section 90.10
of  this title and where the issuer complies with all other requirements
of such section; provided, however, that if the bonds to be refunded are
to be redeemed or paid on the same  date  as  the  refunding  bonds  are
issued,  the issuer need not comply with the provisions of section 90.10
of this title relating to the escrow of the proceeds of the sale of  the
refunding bonds.
  * NB Effective September 30, 2023
  d.  With the approval of and on terms and conditions prescribed by the
state  comptroller,  a  municipality,  school   district   or   district
corporation may issue bonds to refund:
  1. Bonds issued,
  2.  Bonds  issued  to redeem notes, certificates or other evidences of
temporary indebtedness issued, or
  3. Bonds issued to refund bonds issued
prior to January first, nineteen hundred thirty-nine, but  in  no  event
shall such refunding bonds mature later than twenty years after the date
thereof. The provisions of section 21.00 of this chapter shall not apply
to this paragraph.
  e. The issuance of refunding bonds shall be authorized by a "refunding
bond  resolution".  The  title  of  such resolution shall state that the
bonds to be authorized thereby are "refunding bonds".
  f. Such a  resolution  shall  contain,  in  substance,  the  following
provisions:
  1. The amount of refunding bonds to be issued.
  2. A description and the date of the bonds to be refunded.
  3. If the bonds to be refunded are bonds which were issued on or after
January  first, nineteen hundred thirty-nine, other than bonds issued to
redeem notes, certificates or other evidences of temporary  indebtedness
issued   prior  to  January  first,  nineteen  hundred  thirty-nine,  in
anticipation of such  bonds,  a  statement  of  the  maximum  period  of
probable  usefulness,  at  the  time  of the issuance of the bonds to be
refunded, of the object or purpose for which such bonds were issued.
  4. A statement of the proposed maturities of such refunding bonds.
  g. The provisions of this chapter relating to the authorization,  form
and contents, sale, execution and issuance of bonds other than refunding
bonds,  shall  apply  to  the  authorization,  form  and contents, sale,
execution and issuance of refunding bonds, except that:
  1. The provisions of section 107.00 of this chapter shall not apply to
the issuance of refunding bonds.
  2. The authorization of the issuance of refunding bonds shall  not  be
subject to a mandatory or permissive referendum.
  3.  Outstanding bonds may, pursuant to a power to recall and redeem or
with the consent of the holders  thereof,  be  exchanged  for  refunding
bonds (i) if the refunding bonds are to bear interest at a rate equal to
or  lower than that borne by the bonds to be refunded or (ii) if, in the
case of the  city  of  New  York  prior  to  July  first,  two  thousand
twenty-four,  the  annual payment required for principal and interest on
the refunding  bond  is  less  than  the  annual  payment  required  for
principal  and  interest  on  the bond to be refunded, in each case such
annual payments to be determined by dividing  the  total  principal  and
interest  payments due over the remaining life of the bond by the number
of years to maturity of the bond or (iii) if the bonds  to  be  refunded
were  issued  by  the  city  of  New York after June thirtieth, nineteen
hundred seventy-eight and prior to July first, two thousand  twenty-four
and  contain  covenants referring to the existence of the New York state
financial control board for the city of New York or any other  covenants
relating  to  matters  other  than  the  prompt payment of principal and
interest on the obligations when due and the  refunding  bond  omits  or
modifies any such covenant.
  4.  All  refunding  bonds shall contain a recital that they are issued
pursuant to this chapter, which recital shall be conclusive evidence  of
their validity and of the regularity of their issuance.
  h. The authority herein granted to authorize the issuance of refunding
bonds  shall  in  no  way  be  affected  by  the  invalidity  of  or any
irregularity in any proceedings authorizing the issuance of the bonds to
be refunded, except that refunding bonds shall not be issued  to  refund
bonds  adjudged  invalid  by  the final judgment of a court of competent
jurisdiction.
  i. 1. Refunding bonds issued subsequent  to  January  first,  nineteen
hundred thirty-nine to refund:
  (a) Bonds issued, or
  (b)  Bonds  issued to redeem notes, certificates or other evidences of
temporary indebtedness issued
prior to January first, nineteen hundred thirty-nine, may be refunded by
the issuance of refunding bonds, but such refunding bonds  shall  mature
not  later  than  twenty  years  from the date of the original refunding
bonds. Such refunding bonds shall be issued only with  the  approval  of
and on terms and conditions prescribed by the state comptroller.
  2.  All  other  refunding  bonds  issued  on  or  after January first,
nineteen hundred thirty-nine, shall not be refunded.
  j. Bond anticipation notes shall not be issued in anticipation of  the
sale of refunding bonds.
  k.  The  premium,  if any, resulting from the public sale of refunding
bonds may be expended for (1) the payment of the costs of  the  issuance
of  such  refunding  bonds,  including,  but not limited to, legal fees,
printing or engraving and publication of notices, and (2) the payment of
the principal of and interest on such refunding bonds.