Document ID: chunk:federal_register_of_legislation:F2016L00850:reg:5
Version: federal_register_of_legislation:F2016L00850
Segment Type: reg
Provision Reference: reg 5
Character Range: 8497–10585

5     50 mm                15 m

       7.4 A design, mark or symbol on an aircraft must not modify, obscure or create confusion about a set of markings on the aircraft.
       7.5 Subsection 7.4 does not apply in relation to:
(a) a Defence Force symbol or call‑sign on an aircraft operated by the Defence Force; or
(b) a design, mark or symbol on an aircraft approved in writing by CASA.

8 Requirements for characters in sets of markings
       8.1 In a set of markings on an aircraft:
(a) the letters must be capital letters in Roman characters; and
(b) the numbers must be Arabic numbers; and
(c) the characters must not be ornamented; and
(d) the letters and numbers must be a consistent height; and
(e) the width of each character (except the letter "I" and the number "1") must be ⅔ of the height of the character; and
(f) the length of a hyphen must be ⅔ of the height of a letter or number; and
(g) the characters must be formed by solid lines with a thickness of 1/6 of the height of a letter or number; and
(h) the characters must be separated by a space of at least 1/6 of the height of a letter or number.
       8.2 The characters in a set of markings may be arranged 1 above the other only if the set is on:
(a) the centre-line of the upper surface of an airship; or
(b) a balloon; or
(c) a rotorcraft.
       8.3 The characters in a set of markings may be slanted if:
(a) the characters remain legible; and
(b) the slant is no more than 35° from the perpendicular.

9 Minimum height of characters in sets of markings
       9.1 A character, other than a hyphen, in a set of markings on an aircraft mentioned in column 1 of an item in Table 4 must be at least the height mentioned in column 2 for the item.

Table 4 — Minimum height of characters in set of markings
Item  Column 1                                                                                                                       Column 2
      Aircraft                                                                                                                       Minimum height of characters