Another 16 participate, but they must sign up on a first-serve basis and pay a $1,000 entry fee.

It is open year round on a first-come, first-serve basis, with a maximum stay limit of two weeks.

Limited seats are still available on a first-come, first-serve basis.

In Manhattan, the services will be sold on a first-come, first-serve basis at the first of each month.

For many courses, open seats are available on a first-come, first-serve basis.

Most sites also offer public tours on a first-come, first-serve basis.

Half of the campsites are available on a first-come, first-serve basis.

Tickets are available on a first-come, first-serve basis before 8a.

No appointment is necessary, tests are given on a first-come, first-serve basis.

Walk in campsites are available on a first-come first-serve basis.