According to the Cat Fanciers’ Association (CFA), what is true about the Chartreux's vocal tendencies?

Answer

Many Chartreux possess a tiny voice they use only rarely.

Official breed information indicates variability, but many individuals in the breed have a very small voice that they employ infrequently, while others might be entirely silent.

According to the Cat Fanciers’ Association (CFA), what is true about the Chartreux's vocal tendencies?
breedFelineVocalizationChartreux