Apply for Accreditation
The Board accredits raters. An accredited rater then rates titles and applies the certification mark on its own authority, under the terms of the Certification Requirements.
Read the Standard and the Certification Requirements before applying. They define who may rate, what may be rated, and how a rater becomes accredited. Everything asked for below comes from those two documents.
Accreditation is granted to an organization rather than to a person or a title, and it covers named domains. Those are settled during assessment, and they appear on your public accreditation record as the domains authorized to emit RESB ratings.