The phrase "although it is allowed" is correct and usable in written English.
You can use it to introduce a contrasting idea or exception regarding permission or acceptance of something.
Example: "Although it is allowed, I still prefer to follow the traditional methods."
Alternatives: "even though it's permitted" or "despite being allowed".
In a statement, he revealed he could not discuss the case but said: "Unbeknownst to me, the glucose tablets contained a substance that is banned in-competition (although it is allowed out-of-competition). "I wish to emphasise that I have never knowingly or deliberately taken any banned substances in my life and that I am opposed to any use of performance-enhancing substances in sport".
We use the term leaf node to describe a node that has no descendants in the annotation graph, although it is allowed to have descendants in the ontology.
Do not swim in Yellowstone Lake; although it is allowed in some areas, the water is very cold.
It also requires that you obtain permission from the Housing authorities in Singapore because in general foreigners are not allowed to buy property in foreign countries although it is allowed in some countries.
On his appointment in 1813, Robert Southey sought unsuccessfully to end this custom, but, although it was allowed tacitly to lapse, it was only finally abolished by Queen Victoria.
The decree prevents Ranbaxy from manufacturing drugs at its most troubled facilities until it can show it is meeting United States standards, although it was allowed to continue making products — including the generic version of Lipitor — at other plants.
The organisation spent around £90,000 on 750 Longines watches for delegates at its congress in June, although Fifa says it was allowed to do so because their value was "trivial".
I haven't drunk for eight years now, although I'm allowed it in cooking because the alcohol is burnt off.
Although I was allowed back for English, maths and science at the same school, that was it.
Although I was allowed to see Ras Tanura, my interview requests were denied.
It's illegal in D.C. to buy or sell recreational marijuana, although growing is allowed.
