Well, the age of 18 is a reasonable one. Perhaps it might be lowered a bit. I wouldn't, however, go as far as Mr. Kingsley did. I think he talked about reporting on the presence of seven-year-olds. I may be wrong. I may have got that number wrong, but I know it was a single digit. I wouldn't go any lower than 16.
On October 17th, 2017. See this statement in context.