<p>There are two types of OPT: Pre-completion OPT and Post-completion OPT</p>
<p>From what I’ve read in the article we’re mostly talking about pre-completion OPT. Post-completion OPT is given after you have finished your degree requirements and is for 12 months at each educational level. You can apply for a 17 month extension if you’re in a STEM field and your employer uses the E-verify system.</p>
<p>For pre-completion OPT there are no real restrictions on unemployment. In post-completion, you have a max of 90 days unemployment.</p>