I am working on L1A Blanket Visa from California office of my employer. I may have to move to my employer's office in North Carolina. I know in case of H1 such location change requires new LCA to be filled. How does it work in case of L1 Visa when work location is changed. Do we need to update USCIS about it and what document is filed for work location change for L1 visa and how much time does it take.