--- title: "CiusAtRules – API-Referenz · Quittio" description: "Rules of the Austrian CIUS of EN 16931: CIUS-AT-NAT 1.0.0 (statutory rules, AT-NAT-…) and CIUS-AT-GOV 1.1.0 (rules of e-Rechnung.gv.at for the federal government, AT-GOV-…), as published by the BRZ for the BMF (e-rechnung.gv.at/go/cius_at_nat, /go/cius_at_gov)." canonical_url: "https://quittio.dev/docs/api/Quittio/Country/AT/Rules/CiusAtRules" locale: de meta: "og:description": "Rules of the Austrian CIUS of EN 16931: CIUS-AT-NAT 1.0.0 (statutory rules, AT-NAT-…) and CIUS-AT-GOV 1.1.0 (rules of e-Rechnung.gv.at for the federal government, AT-GOV-…), as published by the BRZ for the BMF (e-rechnung.gv.at/go/cius_at_nat, /go/cius_at_gov)." "og:image": "https://quittio.dev/og/quittio-de.jpg" "og:image:alt": "Quittio: E-Rechnungen für PHP und Laravel. Rechtssicher, validiert, archiviert, mit geprüfter Beispielrechnung." "og:image:height": "630" "og:image:type": image/jpeg "og:image:width": "1200" "og:title": "CiusAtRules – API-Referenz · Quittio" "twitter:image": "https://quittio.dev/og/quittio-de.jpg" "twitter:image:alt": "Quittio: E-Rechnungen für PHP und Laravel. Rechtssicher, validiert, archiviert, mit geprüfter Beispielrechnung." --- > Index of every page on this site: [llms.txt](https://quittio.dev/llms.txt) [API reference](https://quittio.dev/docs/api) / [Quittio](https://quittio.dev/docs/api/Quittio) \\ [Country](https://quittio.dev/docs/api/Quittio/Country) \\ [AT](https://quittio.dev/docs/api/Quittio/Country/AT) \\ [Rules](https://quittio.dev/docs/api/Quittio/Country/AT/Rules) # CiusAtRules final class in quittio/country-at `Quittio\Country\AT\Rules\CiusAtRules` · [Source](https://github.com/Quittio/quittio/blob/v0.7.1/packages/country-at/src/Rules/CiusAtRules.php#L25) Rules of the Austrian CIUS of EN 16931: CIUS-AT-NAT 1.0.0 (statutory rules, AT-NAT-…) and CIUS-AT-GOV 1.1.0 (rules of e-Rechnung.gv.at for the federal government, AT-GOV-…), as published by the BRZ for the BMF (e-rechnung.gv.at/go/cius\_at\_nat, /go/cius\_at\_gov). The CIUS documents state no severity; every rule is an error. Where EN 16931 forbids a value that the CIUS makes mandatory (the VAT rate of category O, BR-O-05 to BR-O-07), EN 16931 wins. ## Constants \# | Constant | Value | Description | | --- | --- | --- | | `GOV_EXTENSIONS` | `['pdf', 'png', 'xml', 'xls', 'xlsx']` | File name extensions of attachments e-Rechnung.gv.at accepts (BT-125). | | `GOV_MAX_AMOUNT_DUE` | `'999999999.99'` | Largest amount due (BT-115). | | `GOV_MAX_ATTACHMENT_BYTES` | `15 * 1024 * 1024` | Largest size of all attachments together in bytes (15 MB). | | `GOV_MAX_ATTACHMENTS` | `200` | Most attachments e-Rechnung.gv.at accepts (BG-24). | | `GOV_MAX_LINE_AMOUNT` | `'999999999999.99'` | Largest line net amount, positive or negative (BT-131). | | `GOV_MAX_LINES` | `999` | Most invoice lines e-Rechnung.gv.at accepts (BG-25). | | `GOV_MIME_CODES` | `['application/pdf', 'image/png', 'text/xml', 'application/xml', 'application/vnd.ms-excel', 'application/vnd.openxmlformats-officedocument.spreadsheetml.sheet']` | Mime codes of attachments e-Rechnung.gv.at accepts (BT-125). | | `GOV_PAYMENT_MEANS` | `['30', '31', '42', '49', '58', '59']` | Payment means codes e-Rechnung.gv.at accepts (BT-81). | ## Methods \# | Method | Description | | --- | --- | | `::government()` | The rules of CIUS-AT-GOV, which adds them to those of CIUS-AT-NAT. | | `::national()` | The rules of CIUS-AT-NAT. | ### `government()`# ``` public static function government(): list ``` static The rules of CIUS-AT-GOV, which adds them to those of CIUS-AT-NAT.
Returns
list<Rule>
### `national()`# ``` public static function national(): list ``` static The rules of CIUS-AT-NAT.
Returns
list<Rule>
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