Okay. You have many many options when linking to your Registration page.
This can be done while including the ReCaptcha. The ReCaptcha is a security measure to prevent spammers from repeatingly clicking the submit button.
I once made a page similar to that one just a couple weeks back. All that it includes is you opening the Admin Center and creating a new "Page". Name it something like "Terms" or "Application" (something along those lines) and then place the links you want that page to go to. In that case, he has 2 links, one to go to Main and another one that goes to the Registration page. You can also have just DECLINE and ACCEPT. If they decline, have it link to Google or something, and if they accept, have it link to the Registration.tpl.