If the TLC is granted, the CO will send a Final Determination notice and a copy of the certified CW-1 Application for Temporary Employment Certification to the employer and a copy, if applicable, to the employer's agent or attorney using an electronic method(s) designated by the OFLC Administrator. For employers permitted to file by mail as set forth in §655.420(c), the CO will send the Final Determination notice and a copy of the certified CW-1 Application for Temporary Employment Certification by first class mail. The CO will send the certified CW-1 Application for Temporary Employment Certification, including approved modifications, on behalf of the employer, directly to USCIS using an electronic method(s) designated by the OFLC Administrator. The employer must retain a copy of the certified CW-1 Application for Temporary Employment Certification, including the original signed Appendix C, as required by §655.456.