# DT-CIUS-PT-020_11.2

Source: https://xmlvalid.com/rules/DT-CIUS-PT-020_11.2

> The BT-22 when prefixed with '#WITHHOLDINGTAXTYPE@WITHHOLDINGTAX-000#', only admits the following values: IRF.

- Level: error
- Rule sets: CIUS-PT rules (Portugal, UBL) 2.1.1
- Context: `//ubl:Invoice/cbc:Note | //cn:CreditNote/cbc:Note`
- Test: `starts-with(normalize-space(.),'#WITHHOLDINGTAXTYPE@WITHHOLDINGTAX-') and not(contains('IRF,', concat(normalize-space(substring-before(substring-after(.,$wht20_11),'#')), ',')))`

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