As you saw with my deleted answer, your sentence is open to different interpretations. Don't be afraid of using more words if it makes your text clearer. Something like this might work:
With this option you can only enter your company name; you cannot enter an active link to your website.
They are different. Firstly, let's see all three verbs in concern.
The verb requisition is used more for official purpose.
requisition - Make a formal request for official services and also meaning #2
An example from OALD for this - The school was requisitioned as a military hospital.
The verb require has several meanings but in the sense you are guessing, it means request and expect (#2)
An example from WW for this - We require our secretary to be on time
The verb request is to politely express that you need something
request - Politely or formally ask for
An example from OxfordDictionaries for this - the chairman requested that the reports be considered
Now your examples:
I require a new car over I request for a new car
Obviously, the latter sentence is more polite as it includes the word request.
Is there any difference in these both -- yes, there is.
The former one is just a statement that shows your requirement. On the other hand, the latter one shows you are politely asking for that requirement. To be a bit straightforward, I require a new car is ordering someone over I request for a new car is asking for a favor and doing so, that someone may oblige you by getting you a new car and not old! :)
Best Answer
Both “considered to be” and “considered as” are incorrect. The words “as” or “to be”, when used after the word “considered” are nearly always superfluous, and therefore unnecessary.
The sentence in your example above (without all of the ellipses, of course) is already structured correctly.
Over the past several years, I have noticed both “considered to be” and “considered as” becoming quite commonly used in writing of all types. Although there may be instances where they could possibly be considered correct in a technical sense, both phrases can nearly always be replaced by better wording that makes more, and better, sense. Reading a sentence containing either phrase out loud should be enough to show that these phrases “just don’t sound right”, and tend to disrupt the flow of the words being read.
Although somebody else may consider my answer to your question nitpicking, or even pedantic, I would urge them to consider spending more time reading books that have been copy-edited.
Considering the veritable lack of editing of any kind with regard to “writing”, as encountered on the internet, it would be wise not to consider online media any sort of primer for written communication. This will undoubtedly aid any writer, particularly one who is considerate of the time and energy people may spend viewing his words, in holding the attention of their readers.