Notice of the filing of an application to create a unit or to increase or decrease the size of the unit area, along with a copy of the application, shall be mailed to each respondent to the application whose address is known, or whose address can be found with reasonable diligence, at least twenty (20) days prior to the date set for hearing. In addition, notice shall be given at least twenty (20) days prior to the date of said hearing by one publication in some newspaper of general circulation printed in Oklahoma County, Oklahoma, and by one publication at least twenty (20) days prior to the date of the hearing in some newspaper of general circulation printed in each county in which the lands embraced within the application are situated. In addition, such additional notice shall be given as is required by the rules and regulations of the Commission.