Multicast enabling Bidir in BSR mode

When implementing Multicast it is possible to configure bidirectional PIM when using Multicast - PIM Bootstrap (BSR). Note the following context sensitive help of the CLI:

R1(config)#ip pim rp-candidate gigabitEthernet 0/0 ? bidir Group range treated in bidirectional shared-tree mode group-list group-list interval RP candidate advertisement interval priority RP candidate priority

The rp-candidate keyword is that used to indicate that BSR is employed.