(1) Upon approval of the application by the board, the licensee will be advised that the licensee may secure an official seal. The following seals are authorized:

(a) pocket seal, the size commercially designated as a 1 5/8 inch seal;

(b) a desk seal or rubber stamp seal the size commercially designated as a two inch seal;

(c) the seal will bear the licensee's name, license number and the legend "Licensed Professional Engineer", "Licensed Professional Land Surveyor" or "Licensed Professional Engineer and Professional Land Surveyor"; and

(d) a seal is allowed to be reduced to one half of its original size.

(2) For stamping plans, specifications and reports, licensees are authorized to use a facsimile made of their official seal. The title page of all sets of plans and all documents filed with public authorities must bear the seal and original signature.

(3) Individuals licensed as a "Professional Engineer", "Professional Land Surveyor" or "Professional Engineer and Professional Land Surveyor" may secure an official seal, which must contain the licensee's name, license number, and the applicable legend "Licensed Professional Engineer", "Licensed Professional Land Surveyor", or "Licensed Professional Engineer and Land Surveyor". For the purpose of sealing printed drawings, specifications, and other appropriate documents, each licensee shall obtain an embossing or rubber stamp and an electronic reproduction facsimile of the seal to be used on documents prepared by or under the supervision of a licensee. When required, the seal or electronic reproducible facsimile must be applied on all final original drawings, with the licensee's signature, to produce legible reproduction on all copies or prints made from the drawings.

(4) A signature is:

(a) an original manual signature of the licensee who applied it; or

(b) a digital signature, which has an electronic authentication process attached or is logically associated with an electronic document, and must be:

(i) unique to the person using it;

(ii) capable of verification;

(iii) under the sole control of the person using it; and

(iv) linked to a document in such a manner that the digital signature is invalidated if any data in the document is changed.