L2S working criteria

Hello, Im on L1A visa done by employer X.My wife has gor L2 from employer X .She works for employer Y. Now can employer Y send my wife with an onsite assignment in deputation in US and in Us payroll in this scenerio? Also does she need EAD approval prior to start work?

If the primary L1A visa holder is already in the US and working for the L1A sponsoring employer, L2 dependent dont need EAD to start working, rather the L2 I-94 is enough proof for authorization to work.

If the primary L1A is not in the US, L2 can’t go to the US and work.