What is the Master’s Work? How should a Brother be acknowledged when performing part of the Ritual?

In the Grand Lodge of New York,

The Master’s work consists of every part of the Ritual that is clearly designated for the Master as well as parts that are customarily delegated to another Brother, such as the Apron Presentation, the Working Tools, the questions in the Lecture of Forms and Ceremonies and the Lecture of Reasons, the Entered Apprentice and Master Mason Historical Lectures, and the Charges. A Brother to whom a portion of the Master’s Work has been delegated is the Worshipful Master at the time of his delivery for purposes of the Ritual. He should neither be announced by the East, nor salute nor acknowledge the East either before or after performing such Work.