"required attendees" is correct and usable in written English.
It is used to refer to people who are required to attend a meeting, event, or function. Example: "All required attendees must confirm their attendance by the end of the day."
Proverbial Pie (or Heightened Security) Previous shareholder meetings have not required attendees to R.S.V.P. or register.
This year's agenda, gathered under the theme of "Taking Responsibility for Tough Choices," required attendees to consider topics as wide-ranging as world trade, pollution, poverty, globalization, American leadership, Islam and the Middle East, China's meteoric economic ascent, corporate governance, AIDS and other health care issues, financial corruption and weapons of mass destruction.
The questions stemmed from Mr. Gore's attendance at a luncheon at a Buddhist monastery near Los Angeles in 1996; his presence at a number of White House coffees in 1995 and 1996, which may or may not have required attendees to contribute to the Democratic Party; and his use of his White House office to make fund-raising telephone calls.
In Burlington, a liberal college town, Trump staffers were eagle-eyed at the door, requiring attendees to take loyalty pledges to enter.
She gave her name only as Jules; Roommates Wanted does not require attendees to provide last names, phone numbers or addresses.
Users will be able to enter details for their events, communicate them with their contacts via e-mail and an optional custom homepage, and receive payments for events that require attendees to pay in advance.
The substance checkpoints are more thorough, requiring attendees to remove shoes, and cops -- both in uniform and undercover -- seemed to almost outnumber the fans.
The weekend sanctuary requires attendees to remain silent at all costs, while partaking in menial tasks like gardening and scrubbing the floors. .
You can even require attendees to sign up via e-mail for these events.
No software download is required for attendees.
Dimdim provides a free, hosted Web conferencing service where anyone can share their desktop, show slides, collaborate, chat, talk and broadcast via webcam with absolutely no download required for attendees.
