I don't think "in accordance with generally accepted business practices"would apply here.

Unsere Prüfung erfolgte in Übereinstimmung mit den österreichischen gesetzlichen Regelungen und berufsüblichen Grundsätzen.

The financial statements give a true and fair view
of the Company’s assets, liabilities, financial
position and profitability, and are in accordance
with generally accepted accounting principles.

http://www.heinzelgroup.com/downloads/heinzel2000.pdf

Relationships with suppliers must always be arms length, consistent with accepted business practices, Terasen policies and in accordance with applicable laws. In dealing with suppliers, employees of Terasen will conduct themselves with fairness, courtesy and good faith. All interactions with suppliers must conform to the requirements of the section of this policy addressing conflict of interest.

http://www.terasen.com/Waterworks/_Global/CodeofConduct.htm

My quibble with Kim's response is that the American reader might think that this annual report has been audited according to GAAP
(US guidelines), which I have no reason to assume (unless Asker knows otherwise)
I would even leave out the [generally accepted] for the same reason