Even though an EU high court had ruled last year against blacklisting the company, an EU working group decided to put the NITC in the sanctions list again.
In July 2014 the 2nd highest EU court ruled that blacklisting the NITC had no grounds.
The regulation will be issued in the EU's Official Journal on Saturday.
The EU has also decided to reinstate sanctions on the Iranian businessman Gholam Golparvar.
The General Court had removed sanctions against him and some other Iranian businessmen in December 2013, saying the listings were legally unbinding.
In 2012, the EU imposed sanctions on Iranian companies and entities over allegations that they have a role in the development of Iran’s nuclear program and circumvented US-led illegal sanctions against the Islamic Republic of Iran.
Several of these sanctions have been scrapped by top EU courts. In late 2014, the Luxembourg-based Court of Justice annulled restrictions imposed by the EU against the Central Bank of Iran (CBI).
Last month, the General Court struck down the illegal sanctions that the 28 members of the European bloc had imposed against Iran’s Bank Tejarat.