This excerpt taken from the BSX DEF 14A filed Apr 10, 2006.
What is the Audit Committees pre-approval policy?
It is the Audit Committees policy to approve in advance the types and amounts of audit, audit-related, tax and any other services to be provided by our independent auditors. In situations where it is not possible to obtain full Audit Committee approval, the Committee has delegated authority to the Chairman of the Audit Committee to grant pre-approval of auditing, audit-related, tax and all other services. Any pre-approved decisions by the Chairman are required to be reviewed with the Audit Committee at its next scheduled meeting. The Audit Committee has approved all of Ernst and Young LLPs services for 2004 and 2005 and, in doing so has considered whether the provision of such service is compatible with maintaining independence.