Data plates for Airplanes, Powered Parachutes and Weight Shift Control (Trikes) or as the are correctly called "aircraft identification plates" are specifically spelled out in CFR 14 Part 45.11(a) and 45.11(e).
The following is text of Part 45.11(a)
(a) Aircraft and aircraft engines. Aircraft covered under §21.182 of this chapter must be identified, and each person who manufacturers an aircraft engine under a type or production certificate shall identify that engine, by means of a fireproof plate that has the information specified in §45.13 of this part marked on it by etching, stamping, engraving, or other approved method of fireproof marking. The identification plate for aircraft must be secured in such a manner that it will not likely be defaced or removed during normal service, or lost or destroyed in an accident. Except as provided in paragraphs (c), (d), and (e) of this section, the aircraft identification plate must be secured to the aircraft fuselage exterior so that it is legible to a person on the ground, and must be either adjacent to and aft of the rear-most entrance door or on the fuselage surface near the tail surfaces. For aircraft engines, the identification plate must be affixed to the engine at an accessible location in such a manner that it will not likely be defaced or removed during normal service, or lost or destroyed in an accident
The following is the text of Part 45.11(e):
(e) For powered parachutes and weight-shift-control aircraft, the identification plate prescribed in paragraph (a) of this section must be secured to the aircraft fuselage exterior so that it is legible to a person on the ground.
Note that on airplanes the required data plate location is the aft fuselage, but on Powered Parachutes and Weight Shift Control it is anywhere on the fuselage airframe visible to a person on the ground. Visible from the ground means you don't have to have a step ladder to see it and it is plainly visible. Permanently attached means rivets or welding, not screws or bolts. Fireproof means steel or stainless steel. Aluminum is not acceptable since it will certainly melt in any aircraft fire. Fireproof marking means engraved in the metal. A magic marker is not acceptable
RULE Number 1: The information on the Data Plate must match EXACTLY, EXACTLY, EXACTLY!!! what is printed on the registration card you received from the FAA. That is why I suggest you wait until you get that registration card back before getting your data plate engraved. If your name on the registration is Smith John; DON"T put John Smith on the data plate. Remember rule number 1!