In this chapter, the following terms have the meanings indicated. Terms Defined. “Applicant” has the meaning stated in General Provisions Article, §4-101(b), Annotated Code of Maryland. “Custodian” has the meaning stated in General Provisions Article, §4-101(d), Annotated Code of Maryland. “Director” means the Director of the Maryland Environmental Service or the Director's designee. “Official custodian” means the Secretary of the Maryland Environmental Service or the Secretary's designee. “Person in interest” has the meaning stated in General Provisions Article, §4-101(g), Annotated Code of Maryland. “Public Information Act” means General Provisions Article, §§4-101—4-601, Annotated Code of Maryland. “Public Information Act Representative” means the person designated by the Service to receive Public Information Act requests and is named on the Service’s website. “Public record” has the meaning stated in General Provisions Article, §4-101(j), Annotated Code of Maryland. “Service” means the Maryland Environmental Service. “Working day” means each day between the hours of 9 a.m. and 4 p.m. except Saturdays, Sundays, and holidays.