A certificate holder may sign and seal plans, specifications, drawings, reports, or any other interior design documents that are required to be signed and sealed under Business Occupations and Professions Article, §8-403, Annotated Code of Maryland, only if the following requirements are met: The certificate holder is competent in the subject matter of the documents by reason of education or experience or both; and The certificate holder either: Personally prepared the documents; or Approved the documents. Definition. In §(A)(2)(b) of this regulation, “approved” means the certificate holder: Had direct knowledge and responsible control over the content of the interior design documents during their preparation; and Performed substantive review and had authority to make revisions of the interior design documents during their preparation. For the purpose of sealing and signing interior design documents under this regulation, a certificate holder shall obtain an individual seal which shall contain: A depiction of the Great Seal of Maryland in the center of the seal; The certification number of the certificate holder above the depiction of the Great Seal of Maryland; The words “Certified Interior Designer” above the certification number of the certificate holder; The name of the certificate holder below the depiction of the Great Seal of Maryland; and The words “State of Maryland” below the name of the certificate holder. The diameter of the seal shall be 2 inches.