Q: a) Which is the one Officer position that exists in the Craft Lodge but not in the RGL or Grand Lodge ? b) Why so ?

The position of Immediate Past Master exists in a private Craft Lodge, whereas Grand Lodges and Provincial or District Grand Lodges do not maintain an equivalent active station for an immediate past presiding officer.

In a Craft Lodge, the Immediate Past Master sits immediately to the left of the Worshipful Master to provide experienced counsel, ensure continuity in governance, and assist during ritual work. Guidance published by the Grand Lodge of India notes that prompting in Craft Lodges should be performed specifically by the Immediate Past Master with respect to the Worshipful Master, while the Director of Ceremonies prompts all other officers and brethren.

In contrast, when a Grand Master or Provincial Grand Master completes his term of office, he relinquishes his active executive duties and joins the general body of Past Grand Masters or Past Provincial Grand Masters. Grand Lodges and Provincial Grand Lodges do not establish an "Immediate Past Grand Master" as a distinct station or office within their active ceremonial structure because administrative continuity and ritual guidance at the grand level are provided through established grand committees, senior grand officers, and executive boards rather than relying on a single predecessor stationed beside the ruler of the craft.