Maryland Code, Courts and Judicial Proceedings § 1-705

(a) In this subtitle, “supplementation” means any payment from a political subdivision to a judge or the surviving spouse of a judge, by way of salary, allowances, or pension. The word includes, but is not limited to, any payment in the form of salary, bonus, pension, spouse's benefit, or expense or travel allowance except: (1) reimbursable expenses actually incurred in connection with the duties of judicial office to the extent permitted by § 1-706; and (2) any pension supplementation expressly permitted by public general law. “Supplementation” excludes payment of benefits under a local group health or hospitalization plan if a judge is entitled to those benefits by law.

(b) Supplementation of a judge's salary is prohibited.