A mobile station apparatus in a mobile communication system, wherein the mobile communication system includes a first base station apparatus capable of restricting an access for a call which is not an emergency call from the mobile station apparatus in a case where a cell of the first base station apparatus is not registered in a list of the mobile station apparatus and a second base station apparatus, the second base station apparatus being a different base station apparatus than the first base station apparatus, wherein the mobile station apparatus comprises: a first unit configured to: select a cell by a cell selection procedure started by the mobile station apparatus, in a case where a radio link failure is detected, wherein said selecting is based on: a criterion of the cell selection procedure; information, used for indicating access restrictions of the mobile station apparatus, the information being broadcast on each cell; and an access class of the mobile station apparatus, wherein the access class being either: a first access class applied for the emergency call, or other access classes applied for other calls; and a second unit configured to access, in a case where the radio link failure is detected upon communication of the first access class, the selected cell even in a case where the selected cell is a cell belonging to the first base station apparatus not registered in the list. a first unit configured to: select a cell by a cell selection procedure started by the mobile station apparatus, in a case where a radio link failure is detected, wherein said selecting is based on: a criterion of the cell selection procedure; information, used for indicating access restrictions of the mobile station apparatus, the information being broadcast on each cell; and an access class of the mobile station apparatus, wherein the access class being either: a first access class applied for the emergency call, or other access classes applied for other calls; and a second unit configured to access, in a case where the radio link failure is detected upon communication of the first access class, the selected cell even in a case where the selected cell is a cell belonging to the first base station apparatus not registered in the list. select a cell by a cell selection procedure started by the mobile station apparatus, in a case where a radio link failure is detected, wherein said selecting is based on: a criterion of the cell selection procedure; information, used for indicating access restrictions of the mobile station apparatus, the information being broadcast on each cell; and an access class of the mobile station apparatus, wherein the access class being either: a first access class applied for the emergency call, or other access classes applied for other calls; and said selecting is based on: a criterion of the cell selection procedure; information, used for indicating access restrictions of the mobile station apparatus, the information being broadcast on each cell; and an access class of the mobile station apparatus, wherein the access class being either: a first access class applied for the emergency call, or other access classes applied for other calls; and a criterion of the cell selection procedure; information, used for indicating access restrictions of the mobile station apparatus, the information being broadcast on each cell; and an access class of the mobile station apparatus, wherein the access class being either: a first access class applied for the emergency call, or other access classes applied for other calls; and a first access class applied for the emergency call, or other access classes applied for other calls; and a second unit configured to access, in a case where the radio link failure is detected upon communication of the first access class, the selected cell even in a case where the selected cell is a cell belonging to the first base station apparatus not registered in the list.