InitialSendCoins
See: MainNet_Launch_Overview#Genesis_Block_Blueprint
NodeCore will not enable sending of coins before "Fri, 05 Apr 2019 17:00:00 GMT". For example, the NC_CLI will provide this message:
ERROR: [V046] Send Coins Failed Transactions are invalid before Fri, 05 Apr 2019 17:00:00 GMT (https://wiki.veriblock.org/index.php?title=InitialSendCoins)