The rules & regulations of the ITTF can be found in the ITTF Handbook of 2017. It can be viewed on the link below:

Handbook

Contact

International Table Tennis Federation
Chemin de la Roche 11
1020 Renens / Lausanne
SWITZERLAND (SUI)
Tel:+41 21 340 70 90
Fax:+41 21 340 70 99