The BBFC endeavours to employ examiners from a wide variety of backgrounds. A broad knowledge of film or video games is required, as well as an ability to grasp classification issues such as violence, imitable behaviour, sexual portrayal and drugs. The Board is also looking for an understanding of child development and an interest in effects and opinion evidence. The BBFC is unable to employ anyone under the age of 18 on account of their possible exposure to age -restricted material while working here. A reasonable balance is kept between men and women, and the Board includes examiners of various ethnic backgrounds, in part to help deal with foreign language films and videos, where a knowledge of the culture of the country is as important as fluency in the language. Recruitment is through advertisement in the national press and on the BBFC website.