The cache is at the published coordinates but to log a find here you must fulfil the following conditions.
1. Sign the log
2. To have found caches with at least 60 of the possible 66 (67 if you count cactus) attributes.
Attributes are symbols listed on the cache page to give an indication of the conditions you will find on the way to the cache and at the cache site. Under the attribute box on a caches page you will see the words ' what are attributes' . There you will find a list of all the attributes available to cache owners when listing their caches.
To verify that you qualify for this cache you can either trawl through all your finds and list your caches with the relevant attributes, or you can go to your profile page on the Project Geocaching web site and scroll to the bottom of the page where you will find a table of attributes and whether or not you have found them. I can also look on this page to check you qualify. If you choose to hide your profile you will either have to list your caches in your log or post a screen shot of that part of the P-GC page.
You are free to sign the log before you qualify posting a note on the cache page but please don't post a Found It log until you do qualify.