N3 — outside your level filter

ただし

ただしtadashiN3formal

provided that; note however — fences off a case not yet covered

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

All examples3

provided that; with one exception — limits what was just said

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
明日あしたの試合しあいは予定よていどおり行おこないます。ただし、雨あめがひどい場合ばあいは中止ちゅうしです。
ashita no shiai wa yotei doori okonaimasu. tadashi, ame ga hidoi baai wa chuushi desu.
Tomorrow's match will go ahead as scheduled. That said, it will be called off if the rain is heavy. neutral

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