At time of filing H1B, the employer makes an LCA (Labour Condition Application) which includes information about the job like salary range and hours (which may be a range, maybe 30-40 hours). If the job changes enough that the LCA is no longer accurate, some action is required (an amended filing may be sufficient, to be honest I'm not sure).
If job responsibilities have changed, especially in a way that reduces the qualification requirements for the job, again they might be required to amend their H1B petition.
I'll just add again that I'm _not_ a lawyer, and only have a cursory understanding from being in the middle of all this myself :)
If job responsibilities have changed, especially in a way that reduces the qualification requirements for the job, again they might be required to amend their H1B petition.
I'll just add again that I'm _not_ a lawyer, and only have a cursory understanding from being in the middle of all this myself :)