Whether you're applying for an L-1A, L-1B, or blanket L visa, the application procedure is lengthy and difficult. The petitioner will be needed to present the relevant documentation in order to demonstrate and show the relationship between the US corporation and the foreign company.
The L-1 visa will also be authorized for varied lengths of time depending on the country an employee is coming from. The time available for L-1B visas is a maximum of five years, whereas the time available for L-1A visas is slightly longer, at a maximum of seven years, with an extension possible.