The Senior Warden (sometimes known as First Warden) is the second of the three principal officers of a lodge, and is the Master’s principal deputy. Under some constitutions, if the Worshipful Master is absent then the Senior Warden presides at meetings as “acting Master”, and may act for the Master in all matters of lodge business. Under other constitutions, only sitting Masters or Past Masters may preside as “acting Master”, and so the Senior Warden cannot fulfill this role unless he is also a Past Master. In many lodges it is presumed that the Senior Warden will become the next Worshipful Master. In some jurisdictions, the position is an elected office, while in others it is appointed by the Master.