(b) - Conditions. Where the hours worked by part-time help exceed five (5) hours in any one (1) day or twenty (20) hours in any one (1) week, the Company will, upon receipt of a grievance(s), pay to the senior employee(s) who files such grievance(s), who would have been available to perform such work, an amount equal to the time worked by the part-time employees in excess of the daily or weekly limitation. It is further agreed that the Company shall be allowed a maximum of fifteen per centum (15%) of the number of dock employees as part-time help in accordance with the above clause. Where the hours of work of a part-time person exceed twenty (20) hours in any one (1) week, such person shall be considered a probationary employee and the conditions of this Agreement shall then apply. The Company agrees not to use back to back shifts of part-time personnel in place of regular employees and nothing in this Article will be used to defeat the hiring of regular employees providing such are available. Part-timers can only work between the hours of 4 p.m. and 12 p.m. No overlapping shifts. All part-timers must start at the same time.
(b) - Conditions. To exercise this option to extend Tenant must:
