The documents for entry and departure of aircraft are marked by which guideline for acceptance?

• A. Are accepted in hand-written block lettering in ink
• B. Are accepted at the Contracting State discretion
• C. Has to be type-written
• D. Has to be type-written or produced by electronic data processing techniques

Answer: (A)

The key idea is that documents for entry and departure of aircraft must be presented in a form that is universally legible and durable for quick, clear verification by authorities. Hand-written block lettering in ink provides a simple, unambiguous way to ensure readability across different languages and printing capabilities, and it avoids issues with fonts, printing quality, or fading that can occur with other formats. While typed or electronic formats are common in modern systems, the established guideline for acceptance emphasizes the enduring clarity of hand-written block letters in ink. The other options introduce variability (state discretion) or reliance on typing/electronic processing, which doesn’t guarantee the same universal legibility and permanence.