E&T § 18-105(b), the supporter may not “[m]ake decisions on behalf of the adult[,]” “[e]xert undue influence on the adult[,]” or otherwise “[c]oerce the adult[.]” E&T § 18-105(c)(1)-(3). Among the defined boundaries governing supported decision-making, such an agreement also must “[b]e documented in writing” with witnessed signatures, and must “document how the adult selected the supporter[.]” E&T § 18-107(b)(1), (7), (11). “Execution of a supported decision-making agreement may not be a condition of participating in any activity, service, or program.” E&T § 18-104(f). Most importantly for purposes of this appeal, [i]f a person under guardianship enters into a supported decision-making agreement under this title, the agreement does not supplant the authority of a guardian of the adult, unless the court authorizes the limitation or removal of guardianship due to the existence of a supported decision-making agreement. E&T § 18-104(b)(1)(i). The agreement “shall” state these limitations and may not “[a]uthorize the supporter or supporters to act on behalf of the adult[.]” E&T § 18-107(b)(9)(ii)(1). “An adult utilizing a supported decision-making agreement may . . . [r]evoke [it] at any time orally, in writing, or otherwise by expressing the adult’s specific intent to” do so. E&T § 18-108(1). Facts and Legal Proceedings At the time of these proceedings, William Pughsley, born in February 1987, was residing in a group home in Bowie. His parents were appointed as guardians of his person on May 12, 2006, based on a finding by the Circuit Court for Prince George’s County that 7

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