Add punctuation: This product is for people 18 years or older
A: This product is for people 18 years or older.

Add punctuation: Fairground organs mechanical street organs mechanical singing birds musical saws and other musical instruments not falling within any other heading in chapter 92 decoy calls of all kinds whistles call horns and other mouthblown sound signalling instruments
A: Fairground organs, mechanical street organs, mechanical singing birds, musical saws and other musical instruments not falling within any other heading in chapter 92; decoy calls of all kinds; whistles, call horns and other mouth-blown sound signalling instruments

Add punctuation: In case there is an error in the data concerning the subscriber heshe has the right to have the error corrected
A:
In case there is an error in the data concerning the subscriber, he/she has the right to have the error corrected.