all the above may not be monks and if 'ordained' mistakenly must be asked to leave.
The candidate must be 20 years of age or more, counting from when "consciousness first appeared in his mother's womb". Because of the obvious difficulty in knowing when this occurred, it is usual to insist on at least 20 years since birth. If, by mistake, he was 'ordained' under the age of 20, the candidate remains a ten precept novice and is not a monk.