@lock-locks

You can set the following locks:

DefaultLock:  Exits:          controls who may traverse the exit to
                              its destination.
              Rooms:          controls whether the player sees the SUCC
                              or FAIL message for the room following the
                              room description when looking at the room.
              Players/Things: controls who may GET the object.
EnterLock:    Players/Things: controls who may ENTER the object if the
                              object is ENTER_OK. Also, the enter lock
                              of an object being used as a Zone Master
                              Object determines control of that zone.
GetFromLock:  All but Exits:  controls who may gets things from a given
                              location.
GiveLock:     Players/Things: controls who may give the object.
LeaveLock:    Players/Things: controls who may LEAVE the object.
LinkLock:     All but Exits:  controls who may link to the location if the
                              location is LINK_OK (for linking exits or
                              setting drop-tos) or ABODE (for setting
                              homes)
MailLock:     Players:        controls who may @mail the player.
OpenLock:     All but Exits:  controls who may open an exit.
PageLock:     Players:        controls who may page the player.
ParentLock:   All:            controls who may make @parent links to the
                              object.
ReceiveLock:  Players/Things: controls who may give things to the object.

SpeechLock:   All but Exits:  controls who may speak in that location
                              (only checked if AUDITORIUM flag is set
                              on that location)
TeloutLock:   All but Exits:  controls who may teleport out of the
                              location.
TportLock:    Rooms/Things:   controls who may teleport there if the
                              location is JUMP_OK.
UseLock:      All but Exits:  controls who may USE the object, GIVE the
                              object money and have the PAY attributes
                              run, have their messages heard and possibly
                              acted on by LISTEN and AxHEAR, and invoke
                              $-commands stored on the object.
DropLock:     All but rooms:  controls who may drop that object.
UserLock:     All:            Not used by MUX, is intended to be used
                              in MUX programming where a user-defined
                              lock is needed.
VisibleLock:  All:            Controls object visibility when the object
                              is not dark and the looker passes the lock.
                              In DARK locations, the object must also be
                              set LIGHT and the viewer must pass the
                              VisibleLock.

Note: If a player fails the UseLock on a parent of an object being searched for $-commands, then the search for attributes stops and the parent chain is not searched further for matches.