Method for causing a change of operating mode

An access control apparatus comprising at least one processor and at least one memory that contains program code, wherein the memory and the program code are configured to with the processor, cause the apparatus to perform:

• detecting a presence of an access authorization verification apparatus in surroundings of an access control apparatus by first communication means of the access control apparatus, and
• causing when the presence of the access authorization verification apparatus in the surroundings of the access control apparatus is detected, a change of an operating mode of second communication means of the access control apparatus,
• wherein the first communication means are configured to communicate wirelessly in accordance with a first communication technique, wherein the second communication means are configured to communicate wirelessly in accordance with a second communication technique, which is different than the first communication technique, wherein the detecting by the first communication means of the access control apparatus is effected without communication between the first communication means of the access control apparatus and the access authorization verification apparatus, wherein the presence of the access authorization verification apparatus in the surroundings of the access control apparatus alters at least one physical quantity that is capturable by the first communication means of the access control apparatus, and wherein the physical quantity is altered solely by virtue of the access authorization verification apparatus being brought into the surroundings of the access control apparatus.