Summary judgment in favor of defendants in effect affirms two legislative acts — the rezoning of two separate tracts of land. Plaintiffs challenge the validity of both legislative acts, but since each rezoning was accomplished by a distinct method, plaintiffs’ challenges present different issues as to each rezoning. Because each rezoning presents a distinct question, each will be considered separately.
As to the South Tract, plaintiffs contend that the rezoning was invalid because the public hearings thereon were held without proper notice. Edenton’s Zoning Ordinance, adopted 27 May 1969, required notice of public hearings to be published in a newspaper “not less than fifteen (15) days prior to the date established for the hearing.” § 14-6. The new Zoning Ordinance, adopted 12 August 1975, reenacted the fifteen-day published notice requirement.
[1] The public hearing to consider the South Tract rezoning application was set for and held on 26 August 1975. Notice of this hearing was published for the first time on 14 August 1975, only twelve days before the hearing date. Timeliness of notice in zoning matters is a mandatory requirement that is strictly construed even where prejudice to a property owner is not shown. 1 Anderson, American Law of Zoning, § 4.12, 171. Failure to comply with the notice requirement invalidates the amendment to the Zoning Ordinance. In the case at bar the record and stipulations of the parties show that the fifteen-day period of § 14-6 of the zoning ordinance was not followed. The zoning of the South Tract to a CS classification is thus rendered invalid.
[2] As to the North Tract, plaintiffs argue that rezoning the tract from R-20 to CH by incorporating the change into a new zoning map is invalid for either of two reasons. First, the zoning change was accomplished by the town council at the meeting on 12 August 1975 after the adoption of the new comprehensive Zoning Ordinance. Since the rezoning occurred after the adop*652tion, it amounted to an amendment of the Zoning Ordinance and was thus subject to the procedures of the ordinance governing amendments. Under § 14-5 an amendment must be submitted to the Planning Board for its recommendation, which did not occur. Further § 14-8 mandates that no application for the “same change of zoning amendment” shall be accepted by the council where a similar application had been denied within the next preceding six months. Here Earnhardt and Burroughs had been denied a CH zoning request on 13 May 1975, some two months prior to the rezoning at issue.
Plaintiffs’ argument is unconvincing. The record shows, through the minutes of the Town Council of Edenton, that at the public hearing and meeting of the council on 12 August 1975, the new comprehensive Zoning Ordinance was adopted by the council and that “as a part of the adoption of a new Zoning Ordinance, a new official zoning map be adopted, incorporating the change from R-20 to Highway Commercial” as to the North Tract. The change in the zoning map was not an amendment to the new ordinance. It was part of the new ordinance.
[3] Plaintiffs argue that the testimony of their witnesses who were present at the public hearing shows that the minutes are incorrect. At trial the court listened to the parol evidence of plaintiffs over the objection of defendants, reserving its ruling until the close of evidence. At that time the court ruled the testimony inadmissible. We agree. The minutes of the governing board of a town, city, or county cannot be impeached or contradicted in a collateral attack, nor is parol evidence admissible to explain, extend or supplement the record of proceedings of a municipal council. State v. Baynes, 222 N.C. 425, 23 S.E. 2d 344 (1942). The adoption of the zoning map including the rezoning of the North Tract was a part of the adoption of the new comprehensive Zoning Ordinance.
As their second reason, plaintiffs argue that if the actions of the council on the new ordinance were “adoptive,” then the council violated the requirement of G.S. 160A-387 in that the new ordinance had not been certified by the Planning Board of Edenton. We disagree. The provisions of G.S. 160A-387 read as follows:
“In order to exercise the powers conferred by this Part, a city council shall create or designate a planning *653agency under the provisions of this Article or of a special act of the General Assembly. The planning agency shall prepare a zoning plan, including both the full text of a zoning ordinance and maps showing proposed district boundaries. The planning agency may hold public hearings in the course of preparing the plan. Upon completion, the planning agency shall certify the plan to the city council. The city council shall not hold its required public hearing or take action until it has received a certified plan from the planning agency. Following its required public hearing, the city council may refer the plan back to the planning agency for any further recommendations that the agency may wish to make prior to final action by the city council in adopting, modifying and adopting, or rejecting the ordinance.”
[4] It is clear that before a municipality can ever exercise the zoning powers granted by the State under the enabling provisions of G.S., Chap. 160A, Part 3, the municipality must designate a planning agency to develop and certify a zoning ordinance. The procedure in G.S. 160A-387 is, however, a prerequisite only to the municipality’s initial exercise of zoning power. Thereafter, the planning agency, which was created at the initial stage, remains present to assist the legislative body in further zoning activity.
The planning agency, here the Planning Board of Edenton, is not a legislative body. In relation to the town council, it functions only in an advisory capacity, and its recommendations are in no way binding on the council. In re Markham, 259 N.C. 566, 131 S.E. 2d 329 (1963); Allred v. City of Raleigh, 277 N.C. 530, 178 S.E. 2d 432 (1971). In any zoning legislation the burden is on the city or town council to properly follow the fundamental concepts of zoning. Allred v. City of Raleigh, supra.
[5] In the case at bar the Town Council of Edenton properly exercised its legislative authority, mindful of the fundamental concepts of zoning and in conjunction with the advice of the Planning Board. The new Zoning Ordinance adopted on 12 August 1976 was a comprehensive reworking of the old Zoning Ordinance. It was not merely concerned with reclassifying particular parcels of land. The new act also rewrote the procedures applicable to zoning matters and redesigned the land use classifications.
*654The new ordinance had been under careful consideration by the Planning Board of Edenton since October of 1974. The town had entered a $6,000 contract with the North Carolina Department of Natural and Economic Resources to study and develop the new ordinance. The proposed ordinance, thus developed by the Planning Board, was presented to the council on 13 May 1975. A joint session of the council and Planning Board was thereafter called to consider the new ordinance and possible changes. The changes discussed at the 26 May 1975 meeting were recommended to the council by the Planning Board. Before adoption, there were two properly called and conducted public hearings. The entire process of enacting the new Zoning Ordinance including its reclassification of the North Tract reflects a careful, deliberate course taken by the town council to provide for the planning and development needs of the town in line with the spirit and purposes of G.S., Chap. 160A, Part 3.
Plaintiffs’ remaining assignments of error have been carefully considered. As to them, no prejudicial error has been shown.
The judgment of the superior court upholding the validity of the rezoning of the North Tract is affirmed. The judgment upholding the validity of the rezoning of the South Tract is reversed, and the case is remanded to the Superior Court of Chowan County with the direction that the rezoning of the South Tract be declared invalid for failure of proper notice.
Affirmed in part, reversed in part, and remanded.
Judges Parker and Hedrick concur.