Job search requirements constrain the effort choice of UI benefit recipients to a minimum number of monthly applications. We analyze how the distribution of search effort and job finding rates react to this constraint. Motivated by job search theory, our intensive margin analysis focuses on the incremental effort that job seekers have to submit relative to their unconstrained effort choice. We use a new type of register data on Swiss job seekers which includes sufficient information to identify both requirement thresholds and unconstrained effort choices on the individual level. We then propose a novel identification strategy to isolate the exogenous component of the match between the requirement threshold and the job seeker's unconstrained effort choice. Our results point towards large, non-linear intensive margin effects of job search requirements, as job finding rates increase substantially in response to a required supplement in search effort. These effects are highly heterogeneous and come at the cost of increased non-compliance and sanction imposition rates. In addition, we show that search requirements can decrease effort when intrinsic motivation for active search is high. This suggests that requirements can operate as reference points and generate crowding out effects that are not predicted by standard job search theory.