Within 30 days of the filing of a valid petition of election, the Executive Director shall send a notice of election indicating that a valid petition has been filed and that an election will be conducted to: The petitioner; All interested employee organizations that qualified for the ballot; and The employer. The notice of election shall provide a sample ballot and identify: The employer; The bargaining unit; Choices presented to the voter. The notice of an on-site election shall include: The 10 days for voting; The location of polling places; and The hours the polls will be open. The notice of a mail ballot election shall include: The date the ballots will be mailed or distributed to the voters, provided that the ballots will be mailed approximately 2 business days before the time period for voting; The 14-day time period in which mail ballots may be postmarked for return to the Executive Director, provided that the final day of the period is not later than 90 days after the election petition is filed; and The date and time the ballots will be counted; The place and time of ballot counting; and Further information that the Executive Director considers appropriate. The notice of an electronic voting election shall include: The 10 days for voting; and The name of the vendor who will communicate with the voter about how to vote. Posting Notice of Election. A copy of the notice of election and the sample ballot shall be posted at the Board’s office at least 21 days before the election. A copy of the notice of election and the sample ballot shall be posted by the employer at all work locations where notices are customarily posted for the benefit of employees in the bargaining unit. The employer shall post the notice of election and sample ballot for at least 21 days before the election or distribution of mail ballots, or for at least 14 days if the time before the election or ballot distribution is shorter, and post them through the end of the election. Posting requirements may be modified by mutual written agreement of all parties filed with and approved by the Executive Director. Notwithstanding §F(2) of this regulation, the Executive Director may tailor posting requirements to provide adequate notice to employees. The employer shall take reasonable precautions to ensure that notices of election and sample ballots are not altered, covered, defaced, or removed before the completion of the election. If a notice is so affected, the employer shall replace the notice of election and sample ballots with a new notice.