(a) The county commission may by order, or the governing body of a municipality by ordinance, adopt an amendment to a project plan.
(b) Adoption of an amendment to a project plan shall be preceded by a public hearing held by the county commission, or governing body of the municipality, at which interested parties shall be afforded a reasonable opportunity to express their views on the amendment.
(1) Notice of the hearing shall be published as a Class II legal advertisement in accordance with section two, article three, chapter fifty-nine of this code.
(2) Prior to publication, a copy of the notice shall be sent by first-class mail to the chief executive officer of all other local levying bodies having the power to levy taxes on property within the development or redevelopment district.
(3) Copies of the proposed plan amendments shall be made available to the public at the county clerk's office or municipal clerk's office at least fifteen days prior to the hearing.
(c) One or more existing development or redevelopment districts may be combined pursuant to lawfully adopted amendments to the original plans for each district: Provided, That the county commission, or governing body of the municipality, finds that the combination of the districts will not impair the security for any tax increment financing obligations previously issued pursuant to this article.