KIEV, Nov. 27 – Two senior officials on Tuesday attacked a controversial proposal to slap a 15% tax on selling of hard currency by individuals recently backed by the governor of the National Bank of Ukraine.

Serhiy Tyhypko, deputy prime minister and social policy minister, said the proposal would create a black market for foreign exchange, hurting the economy.

“I take this very negatively,” Tyhypko said. “Nothing good will come out of this. It will only strengthen the black market.”