By default only system administrators are authorized to access and change process version codes. In order to change or extend this authorization you can edit Process Access Control List.
Security Profile
Premade security profiles are listed in this section. These profiles may consist of users, positions, departments, user groups and their access types. Security profiles can be managed from Edit Domain task at Administration.
Additional Permissions
Besides security profiles, additional permissions may be given on this section.
Identity
Select user, position, department or user group to authorize.