The Lemax system supports 4 different types of accommodation unit capacities:

Allotment – Allotment units can be booked directly when available and if within release period terms
Fixed – Units bought in advance from a supplier which only you can book. You will have to pay for these units to your supplier whether you manage to sell them or not.
Fixed that need additional checking – Accommodation units that need to be checked for availability prior to booking. This is usually used when you are working with private accommodation owners where only information about the periods that are sold is correct but you cannot guarantee accommodation availability.
On request – Units that need to be checked for their availability every time you want to make a reservation.