Rizwan accepted the sanction and pleaded guilty to the offence, eliminating the need for a formal hearing.
The charge was leveled by on-field umpires Chris Brown and Paul Reiffel, along with third umpire Michael Gough and fourth umpire Wayne Knights.
New Zealand produced a solid performance in the ODI series opener, cruising through to a 73-run win in Napier.
Led by a blazing ton from Mark Chapman, the hosts put 344/9 on the board, and Nathan Smith’s career-best figures bundled out Pakistan for 271.
The second ODI takes place on Wednesday, April 2 in Hamilton.