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Permitted characters for the CSS Web form

For security reasons, some non-standard keyboard characters can not be accepted on the CSS Web entry form. The following list shows the list of of permitted characters:

a-z (all lower case letters)
A-Z (all upper case letters)
0-9 (all numbers)
, (comma)
. (period)
' (single quotes)
- (hyphen)
# (pound)
( (opening parenthesis)
) (closing parenthesis)