ROME, Sept 23 (Reuters) - BlackRock ( BLK ), the world's

biggest asset manager, has secured Italian government approval

to hold a stake of more than 3% in defence and aerospace group

Leonardo, a government document showed on Monday.

The document, sent by Prime Minister Giorgia Meloni's office

to parliament, deals with so-called "golden power" decisions.

Italy's government has "golden powers" to block or set

conditions on foreign and domestic investments, as well as

governance changes, involving companies that operate in

strategic sectors such as energy, telecoms, defence and banking.