Banro is grandfathered in, they are not subject to any government regulations or changes, those would only affect new start-up operations. And it's not a law, only talk of possible future changes, President Joseph Kibala is not in support of those changes to the mining code, it's old world French/Dutch private interests left over from colonization who make these threats to keep involvement in the politics of the country. They think that they can solve all the budget shortfalls from taking the money from the only viable industry in the country, but it's effectively a coup in process, they are going for the money, and trying to take over the country politically,just like they do in the rest of Africa, it's basically European crooks manipulating the politics of the country. It has a very slim chance of actually happening and if it does, Banro will not be affected.
You can call Naomi Nemeth at Banro investor relations, she has dealt with this issue several times and I personally asked her about this story when it came up in the past, she confirmed that #1 Banro is not subject since it is a exception and has secured the deals, and #2 the talk is political rhetoric among special interests and politicians.