Fla. Stat. § 132.43
That portion of such proceeds from the sale of general obligation refunding bonds, together with any other moneys placed in escrow by the unit and together with interest earned thereon, which shall be required for the payment of the principal of and interest on general obligation bonds to be refunded or the general obligation refunding bonds, in accordance with the refunding financial plan, shall be irrevocably committed and pledged to such purpose and the holders of such general obligation bonds to be refunded or such general obligation refunding bonds, respectively, shall have a lien upon such moneys and the investments thereof. The pledges and liens provided for in this section shall become valid and binding upon the issuance of the general obligation refunding bonds and the moneys and investments held by the escrow agent shall immediately be subject thereto without any further act. Such pledges and liens shall be valid and binding as against all parties having claims of any kind in tort, contract, or otherwise against the unit irrespective of whether such parties have notice thereof. Neither the refunding bond resolution, the escrow agreement, nor any other instrument relating to such pledges and liens need be filed or recorded.
Fla. Stat. § 132.43