Section 1.

(a) Yard Vacancies. Subject to the provisions of the Five-Day Work Week Agreement and the applicable Schedule Rules, protected employes on the yardmen's extra board will be called for all blankable yard vacancies unless their services are required for a known must-fill vacancy.

An extra protected yardman may be held for a known must-fill vacancy and should such vacancy not materialize, the employe will be paid a basic day's pay and retain the first-out position on the extra board. It is further understood that such extra protected yardman called for and performing subsequent service will be compensated under existing applicable Schedule Rules. (Intpns. Pg. 16-18)(b) Road Vacancies. Protected employes on the brakemen's extra board will be called for all second brakeman vacancies unless their services are required for a known must-fill vacancy.

An extra protected brakeman may be held for a known must-fill vacancy. If the held employe fills the vacancy and the earnings therefrom are less than the earnings of the assignment to which entitled, the employe shall be paid difference in earnings and placed on the extra board after completion of the tour of duty worked in accordance with the existing Schedule Rules without regard to the assignment missed.

Should the vacancy for which held not materialize, the employe will be paid the earnings of the assignment to which entitled had the employe not been held and will be placed on the extra board in the same manner as though the employe had worked the assignment.  (Intpns. Pg. 18-19)

Should such employe be used in emergency while being withheld from the extra board in these circumstances, earnings therefrom shall not be used to offset earnings of the vacancy missed. (Intpns. Pg. 18-19)

Section 2.  Force Assigning From Blankable Positions.

(a) Must-Fill Yard Vacancy. When there are no extra yardmen available on the extra board and there is a known must-fill yard vacancy, the available proteced yard helper holding a blankable yard helper position in the same starting time bracket will be required to fill the position for one tour of duty, as follows:

Use the junior protected helper on a shift:

First: Same starting point within the terminal with the
(1) same starting time
(2) earlier starting time
(3) later starting time

Second: At another starting point within the terminal with the
(4) same starting time
(5) earlier starting time
(6) later starting time

Third: If the vacancy cannot be filled by any of the above, then procedures of existing Schedule Rules shall apply.

If a protected yardman is not used on the vacancy for which held, such yardman will be paid loss of earnings. If used at the same starting time as the yardman's regular assignment, the employe will be paid at pro rata rate for the regular eight-hour period and actual overtime worked. If used in advance of the assigned starting time in the same starting time bracket, the employe will be paid at time and one-half for the shift. If used later than the regular starting time, pay will commence at the starting time of the employe's regular shift.

(b) Must-Fill Road_Vacancy at Extra Board Point. When there are no extra brakemen available and there" is a. known must-fill road vacancy, the most junior available protected road brakeman holding a blankable road brakeman position at that location will be used to fill the position for one trip or one tour of duty without loss of earnings. If the vacancy cannot be filled in this manner, existing rules will apply. (Intpns. Pg. 19)

(c) Must-Fill Vacancy at Far Terminal. At the away-from-home terminal where a protecting extra board is not maintained, if there is a known must-fill brake-man's vacancy in the first-out pool freight crew, a brakeman from the following turn will be stepped up to the must-fill vacancy in accordance with existing Schedule Rules and returned to his regular turn upon arrival at the home terminal. In all cases, the employe shall be paid as per existing Schedule Rules. (Intpns. Pg. 19-20)

(a) Extra lists will be regulated in accordance with existing rules and practices, predicated as nearly as possible on must-fill positions in keeping with subsection (b) hereof.

(b) The Carrier shall maintain a sufficient number of employes to permit reasonable layoff privileges and to protect vacations, personal leave days and other extended vacancies.