This section, if filled in, overrides the default values set in the Allotment
Start Date and End Date: the dates on which the release is valid
Release: the number of hours (H) and/or days (D) before check-in, within which the room can be released if unsold. It no longer appears in availability. If both are set, they will add up.
Max Release: the room becomes available if the request is made a maximum of N hours (H) and/or days (D) before the check-in. If both are set, they will add up.
Free Sale Only: if checked, the release set applies only to flex/extra allotments and not also to basic allotments.
Split: if selected, it allows you to insert a new period of release, inside a period previously inserted.