Add spaces: Circumference:approx.180cm

Answer: Circumference: approx. 180 cm

Add spaces: Registrationwillbepossiblefromaround16.00hrsattheplayingsite.

Answer: Registration will be possible from around 16.00 hrs at the playing site.

Add spaces: Withintherules,everythingshouldbepossible.

Answer:
Within the rules, everything should be possible.