Complex sentence: In August 2016, the United States government announced a new federal source code policy which mandates that at least 20% of custom source code developed by or for any agency of the federal government be released as open-source software (OSS).
Split into simpler sentences: In August 2016, the United States government announced a new federal source code policy. This policy mandates that at least 20% of custom source code developed by or for any agency of the federal government must be released as open-source software (OSS).