Argentina's mining will continue without retentions.... Argentina's congress approves income tax reform, leaving out the opposition plan to reinstate the 5% export tax on mining.
Sergio Uac, Governor of San Juan, stated that "mining will continue without retentions because it implied legal uncertainty, which I believe is the most complex condiment that we can show to international investors". He also said that "export withholdings of metalliferous and non-metalliferous minerals are eliminated" (translation from Spanish news source).
https://www.diariodecuyo.com.ar/argentina/La-reforma-de-Ganancias-acordadadeja-afuera-las-retenciones-mineras-20161220-0117.html