Within 62 days of receipt of a complete application, the Board shall hold a public hearing. Notice of the public hearing shall be published in the official newspaper at least 10 days prior to the date set for public hearing. In addition, not less than 10 days before the date of the hearing (not counting the date of the hearing), written notice of the public hearing shall be mailed to the owners of all property abutting the exterior boundaries of the land involved in the application and to all other landowners having property located within 300 feet of the exterior boundaries of the land involved in the application, as the names of said owners appear on the last completed assessment roll of the Town. The notice shall include the name of the project, the location of the project site, and the date, place, time and subject of the public hearing at which the site plan will be reviewed. If an application for a special use permit contains an agricultural data statement, written notice of such application, including a description of the proposed project and its location, shall be mailed to the owners of land as identified by the applicant in the agricultural data statement. At least 10 days before such hearing, the Board shall mail notices thereof to the County Planning Board as required by § 239-m of the General Municipal Law.