# BR-CIUS-PT-41

Source: https://xmlvalid.com/rules/BR-CIUS-PT-41

> The Buyer address line 3 (BT-163) shall be filled.

- Level: error
- Rule sets: CIUS-PT rules (Portugal, UBL) 2.1.1
- Context: `cac:AccountingCustomerParty/cac:Party/cac:PostalAddress`
- Test: `exists(cac:AddressLine) and not(cac:AddressLine/cbc:Line)`

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