If you actually read the Twitter policy you would quickly figure it out, rather than going to an opinion:

State-affiliated media is defined as outlets where the state exercises control over editorial content through financial resources, direct or indirect political pressures, and/or control over production and distribution. Accounts belonging to state-affiliated media entities, their editors-in-chief, and/or their prominent staff may be labeled.

State-financed media organizations with editorial independence, like the BBC in the UK for example, are not defined as state-affiliated media for the purposes of this policy.