MANUAL BLOCK RULES 300. Manual Block Rules will be in effect as specified by Time Table, General Order or Train Order. 301(a). Trains carrying passengers will proceed at normal speed only after receiving "clear block" indication. 301 (b). Other trains may proceed at normal speed after receiving "clear block" or at reduced speed after receiving "occupied block" indications. "Occupied block" indication may not be given if block is occupied by a train carrying passengers, if, after entering occupied block, a "clear block" indication is received, train may resume normal speed. 301(c). All trains must approach block stations expecting to find rear end of preceding movement occupying track ahead regardless of block indication received. The use of Manual Block Rules do not relieve crews from protecting against following movements as per Rule 99. 302. Block stations will be designated by Time Table, General Order or Train Order. 303. At attended block stations: All trains must receive Clearance Card Form "A", Item 3 showing block indication. Operator must determine block condition from employe in charge of block station in advance. 304. At unattended block stations: All trains must report arrival unless otherwise instructed, and receive advance block indication from train dispatcher. 305. When communications between block stations or between block station and train dispatcher fail, all trains, may, if their superiority permits and after having waited ten minutes, proceed at reduced speed to the next block station in advance. Attempts will be made to communicate by train radio or other means at available points enroute to determine condition of block. 306. A block record must be maintained by block operators and train dispatcher of all movements and times must be recorded when blocks are secured, occupied and cleared.