Americans with relatives in Cuba can visit and send remittances without limit, according to rules announced by the US Treasury on Thursday that relax some aspects of the trade embargo and lay the legal groundwork for banking and telecommunications ties between the two countries.

The announcement, which came four months after Barack Obama’s executive order to relax restrictions in April, does not affect the general embargo on trade and travel for non-Cuban Americans, but could trigger a flow of cash into the island from the large Cuban community in the US.