Bitcoin hardfork howto: Priventing replay attacks.

2 Bitcoins are about to become a reality.

HardFork Date: 2017-08-01 12:20 p.m. UTC

Timer: https://www.timeanddate.com/countdown/launch?iso=20170801T1220&p0=1440&msg=Bitcoin+Cash+Hardfork&font=sanserif

Rule number 1:
Control your bitcoins by owning the private keys before the hardfork time.

Rule number 2:
Spend them on the bitcoin cash side first after the hardfork time.

According to bitcoincash.org site:
How is transaction replay being handled between the new and the old blockchain?
Bitcoin Cash transactions use a new flag SIGHASH_FORKID, which is non standard to the legacy blockchain. This prevents Bitcoin Cash transactions from being replayed on the Bitcoin blockchain and vice versa.