(a) Of necessity these rules and regulations are general in nature because of many varying conditions existing in different State agencies. To carry out the mission of using travel expense funds economically, agencies are responsible for:

1. (1) authorizing travel only when necessary;
2. (2) maintaining proper control to see that travelers are not in a travel status any longer than assignments require;
3. (3) selecting the method of travel whether air, train, bus, State or personally owned or rental vehicles;
4. (4) designating the official station of each employee in the best interests of the State;
5. (5) authorizing attendance at conferences, seminars, and similar events.