Are lawyers robes and attire worn only for BC court tax deductable as an expense?

Lawyers must wear court robes to appear in court, these can be worn no where else except when carrying out the work in court.  They are a sizeable and necessary cost to allow lawyer to work.

Credits and deductions

Yes, lawyer robes and attire are tax-deductible.
For more information please refer to the following Canada Revenue Agency (CRA) article:
Thank you for choosing TurboTax