#5 Increased fuel allowance
Drivers are now permitted to use up to 110 kilograms of fuel in 2019 - 5 kilograms more than what was permitted in 2018. This means that drivers can make use of full engine power at all times and fuel conserving strategies which were commonplace especially in the latter part of the races can now be a thing of the past as the drivers can go full throttle even in the closing laps.
#4 End of race signal will no longer be the chequered flag
To avoid embarrassing moments like the one we had in the 2018 Canadian Grand Prix where the chequered flag was waved mid-way through the race, the FIA has mandated that from this season onward, the official closing signal of the race will come by an electronic chequered light panel. The iconic chequered flag will still be waved though, albeit only for ceremonial purposes.