The State may pay part of the replacement income paid to employees benefiting from early retirement benefits, in application of a national professional agreement giving entitlement to an exemption from social security contributions under the conditions provided for in Articles L. 5123-6 and L. 5422-10 and a company agreement under the conditions defined below, when the employees are experiencing difficulties in adapting to changes in their jobs due to the specific conditions under which they carry out their activity.