The phrase "to apply to" means to seek a position or opportunity, typically by submitting an application. It can also refer to seeking permission or adhering to rules and regulations.
This doesn't apply to same - sex connections, as either person can initiate. (datingadvice.com)
Although this doesn't only apply to new graduates, most new grads don't realize just how sensitive hiring managers can be to seemingly innocent resume mistakes. (thejobnetwork.com)
Many state rules also apply to other electronic communications — including websites. (lawyerist.com)