The phrase 'conditions by which' is a correct and usable phrase in written English.
You can use it to refer to the rules and regulations that must be met for something to be accomplished. For example: "We must adhere to the conditions by which our business operates in order to ensure its success."
It seeks to replicate algorithmically the conditions by which evolution works, and render the process as a game.
What later became known as Hamilton's rule predicted the conditions by which one individual would likely behave altruistically toward another.
We are actually creating the conditions by which the Afghans themselves, and not an occupying army, can run their own affairs".
The bill aims to codify terms and conditions by which the government can acquire land from farmers for development projects and other infrastructure needs.
The jirga will set out the conditions by which Afghans who no longer wish to support the Taliban can take on a peaceful, honorable life within the Afghan system.
This structure, while making for a wondrous twist, also renders more or less everything that leads up to that revelation mere exposition, and worse — a careful puzzle-plotting to bring about the specific and peculiar conditions by which the grand twist of fantasy gets a context in which it makes sense.
Ayliffe-Chung, from Derbyshire in the UK, was days into a three-month stint doing casual labour on farms in the area – a condition by which working holiday makers can extend their visit to Australia.
Now, using fixed sets of derivations, we give a condition by which a lattice becomes a modular lattice.
That was the condition by which Funn Funeral Home was able to snatch the business away from Chapman's but, unfortunately, things don't quite go as planned and hilarity ensues.
Likewise, we may say that any abuse, degradation, enslavement, character assassination, oppression, humiliation, dehumanization or any other condition by which a fellow human being is being stripped of dignity and value; or taken advantage of either by another person, groups of individuals, government or any political, military or ideological system, represents a form of killing.
In order to examine this issue we consider the case of statelessness, which has been defined as the condition by which someone "under national laws, does not enjoy citizenship - the legal bond between a state and an individual - with any country" [ 3].
