29 CFR §1402.1

The notice of dispute filed with the Federal Mediation and Conciliation Service pursuant to the provisions of section 8(d)(3), of the Labor-Management Relations Act, 1947, as amended, shall be submitted electronically via a platform provided by FMCS. If electronic submission creates an undue hardship, the filer may contact the FMCS Notice Processing office to explain the circumstances and receive assistance. The Form F-7, for use by the parties in filing a notice of dispute, has been prepared by the Service.