Evidence shall be admitted in accordance with this chapter and State Government Article, §10-213, Annotated Code of Maryland. The rules of evidence observed by courts do not apply to hearings under this subtitle. The presiding hearing officer shall admit evidence, including reliable hearsay evidence, if it is the kind upon which reasonable persons are accustomed to relying in administrative proceedings. Irrelevant or unduly repetitive evidence may be excluded. The presiding hearing officer shall observe the rules of privilege recognized by law. All testimony at a hearing shall be under oath or affirmation and subject to the penalties of perjury. The presiding hearing officer may admit as evidence all or part of the information described under COMAR 28.02.01.21. Sequestration of Witnesses. Upon request by a party, or on their own behalf, the presiding hearing officer may sequester witnesses from the hearing room. The presiding hearing officer shall order the witnesses, parties, attorneys, and all others present in the hearing room not to disclose to any witness sequestered under this section the nature, substance, or purpose of testimony, exhibits, or other evidence introduced during the witness’s absence.