That's interesting CB. My new EASA licence has "Night" listed on the Ratings Held page. On the JAR one ISTR that it wasn't mentioned at all, as having a Night Rating (or Qualification then) was a prerequisite of either the CPL or IR (Can't remember which).
I thought it was a bit strange too. My previous licence was a JAR PPL which displayed it as the inclusion of the text: "The privileges of this licence may be exercised at night".
Naturally I thought since it was now a rating it would be under ratings, but when I queried it on the phone, the lady put me on hold and went to check with a "Technical Support Officer" who confirmed that it should be under "Restrictions .... Night: Nil".
I think it depends on who does your licence however, as my IMC rating is down as "IRR(A)" which is exactly the same as what a colleague of mine has that entitles him to renew instrument ratings!