N3 — outside your level filter

provided that; note however — fences off a case the statement just made does not cover

見学けんがくは自由じゆうです。ただし、写真撮影しゃしんさつえいはご遠慮えんりょください。

kengaku wa jiyuu desu. tadashi, shashin satsuei wa go enryo kudasai.

You are free to look around. Please refrain from taking photographs, however. formal

会費かいひは一人ひとり千円せんえん。ただし、学生がくせいは半額はんがく。

kaihi wa hitori sen'en. tadashi, gakusei wa hangaku.

The fee is a thousand yen per person. Students, however, pay half. neutral

Variants

但しtadashialternant
the kanji spelling, kept in contracts, regulations and printed notices; ordinary writing uses kana.

ただし

ただしtadashiN3formal