A method for securing a variety of spatial volumes, e.g. rooms, drawers, trays, boxes, cabinets, furniture pull-outs, wherein each has at least one closure element (1, 2, 3, 4) provided with an electrically operable locking unit (1', 2', 3', 4'), for example, an electromechanical lock, in order to limit or close, for example, a door, window, hatch, pull-out unit, drawer, wherein a control unit is provided for the actuation, i.e. the opening and closing of the locking units (1', 2', 3', 4'), and with a code generator to generate an access authorization code, wherein the existing closure elements to be secured, together with their respective locking units are grouped or divided into a number of groups, wherein upon a given signal output of the code generator, all the locking units (1', 2', 3', 4') of the thus respectively selected group are simultaneously adjusted to the open position by the control unit and thus all the closure elements (1, 2, 3, 4) of this group are released for opening, characterized in that - upon opening of a closure element (1, 2, 3, 4) of the said selected group by the control unit, the locking units (1', 2', 3', 4') immediately adjust all the closure elements of this group remaining unopened to their locking position - upon unlocking of the locking units (2', 3', 4') again adjusted to the locking position by the control unit, the closure elements (2, 3, 4) of this group are only released after the closing of the open closure element of this group and the locking of the locking unit of this closure element, and optionally only after the elapse of a predetermined period of time, and - upon the control unit receiving a signal from the code generator, unlocking signals (1", 2", 3", 4") are sent from the control unit to the locking elements (1', 2', 3', 4') of the closure units (1, 2, 3, 4) of the selected group, while the unlocking signals to the locking units (2', 3', 4') of the remaining closure elements (2, 3, 4) of this group are interrupted upon opening of the selected closure element authorized for access control, or optionally after a predetermined short period of time, or locking signals are sent from the control unit so that a release of the locking units (1', 2', 3', 4') and closure elements (1, 2, 3, 4) of the selected group is only possible for the period of time from the signal output by the code generator until the opening of a closure element of this group. - upon opening of a closure element (1, 2, 3, 4) of the said selected group by the control unit, the locking units (1', 2', 3', 4') immediately adjust all the closure elements of this group remaining unopened to their locking position - upon unlocking of the locking units (2', 3', 4') again adjusted to the locking position by the control unit, the closure elements (2, 3, 4) of this group are only released after the closing of the open closure element of this group and the locking of the locking unit of this closure element, and optionally only after the elapse of a predetermined period of time, and - upon the control unit receiving a signal from the code generator, unlocking signals (1", 2", 3", 4") are sent from the control unit to the locking elements (1', 2', 3', 4') of the closure units (1, 2, 3, 4) of the selected group, while the unlocking signals to the locking units (2', 3', 4') of the remaining closure elements (2, 3, 4) of this group are interrupted upon opening of the selected closure element authorized for access control, or optionally after a predetermined short period of time, or locking signals are sent from the control unit so that a release of the locking units (1', 2', 3', 4') and closure elements (1, 2, 3, 4) of the selected group is only possible for the period of time from the signal output by the code generator until the opening of a closure element of this group.