currently i am on L2 EAD . I am filing premuim H1B COS this year . Suppose my COS gets approved in May and i get a extended I - 94 . If i have to travel in month of July for 2 weeks , should i surrender new 1 - 94 or both . When i enter US after 2 weeks on L2 the new i - 94 will have expiry date of L2 . would COS still be in effect and can i work for H1 employee from oct 1 without stamping or leaving US ?