Bib numbers and entry fees for B.A.A. events cannot be transferred, refunded, or deferred to another year. B.A.A. Half Marathon B.A.A. 5K B.A.A. 10K Cancellation What if I cannot participate (injury or otherwise) in the B.A.A. Half Marathon, B.A.A. 10K, or B.A.A. 5K once I have registered?