The phrase "a practice whereby" is correct and usable in written English.
It can be used to describe a method or approach in which something is done or achieved.
Example: "The organization has implemented a practice whereby employees can work remotely two days a week."
Alternatives: "a method in which" or "a procedure that allows".
The EU's regulations allow "zero rating", a practice whereby certain sites or applications are not counted against data limits.
Police massaging of figures on rape involved a practice whereby officers classed allegations as crime-related incidents rather than crimes, meaning the cases were not investigated properly.
They also welcomed progress on taxing patent boxes, a practice whereby intellectual property royalties can divert profits from the countries where they are made.
The administration is on firmer ground in proposing to change a practice whereby companies shift income from foreign subsidiaries to foreign tax havens, erasing their United States tax liability in the process.
The agencies themselves abuse small contractors through a practice whereby they invite small-business contractors to bid on contract renewals with the full knowledge that their only intention is to award the contract to the existing incumbent.
There is even a class action suit (embedded below) against Predicto and cell phone carrier Alltell for recycling "dirty numbers," a practice whereby a phone number of a previous subscriber is assigned to a new customer who continues to be billed for the service that the old customer signed up for.
Regulatory officials also said yesterday that contrary to published reports, neither the S.E.C. nor the exchange had found any evidence of front running, an illegal practice whereby a trader buys a stock in advance of a larger institutional order to buy the share.
OPEN SEAT A longstanding practice whereby an Esalen facilitator makes himself available for two hours to hear out any thoughts or feelings you might have.
More than 100 Palestinian prisoners in Israeli prisons launched a mass hunger strike last week against Israel's policy of administrative detention, a draconian practice whereby Palestinians are detained on "secret evidence" and without being charged.
They may also try to end a dubious practice whereby private equity partners convert the relatively small share of their pay that is taxed as ordinary income, at 35percentto to investment profit taxable at 15percentt.
Typically, adolescent girls are expected to adhere to 'purdah,' a religious practice whereby women cover their bodies in public and generally avoid being seen by men who are not directly related to them.
