Seals
The seal says one thing: this event scored the PCSC rubric as published, judged independently, published its rules before it opened, and gave every entrant their breakdown. It is free to display, needs no permission and costs nothing. Nobody signs anything, and the council does not verify the claim: what makes it checkable is the rules you published.
For an event scoring the rubric as published, with judges scoring alone. How you run the event is yours: eligibility, format, timing, materials and divisions are recommendations in the Event Guidelines, not conditions of the seal. Totals from any two such events compare directly.
Downloading, embedding or displaying a seal accepts the Seal Usage License: the seals are provided as is, and displaying one releases the Council and its directors from claims arising out of that use.
Using them
The seal means the rubric is unmodified, apart from weights declared within the published allowance. An event that rewrote a criterion or reworded a band has left the Standard and should say what it used instead, which is a perfectly respectable thing to publish.
A seal that links to nothing is decoration. Point it at the page where your rules, your rubric and any declared weights are published, so a reader can check the claim in one click.
Scale it, place it anywhere, use the light or dark version. Do not recolor it, redraw it, or set it in another typeface, because the point of a seal is that it looks the same everywhere.
There is no fee, no application and no register. The council does not inspect events or audit results. Your published rules are the proof, which is why the seals are only worth anything when they are public.
The claim is set out in full in Conformance, at the front of the standard. What the council recommends for everything the seal does not cover is in the Event Guidelines. The terms for using the seals are the Seal Usage License.