Requirements for the last three ranks

The Decay ranks are awarded to the 76 players (tweakable) in the world with
the highest score (experience points) and reached the 40th rank. The rank is
based on the previous week total amount of experience points and divided as
follow:
Major General 50 players
Lieutenant General 25 players
Supreme Commander 1 player
The Decay Ranks will not generate any unlocks.

Highest score is the aggregated score (total summary of Career points) at the specific time of calculation, which should be at a time where the player count is as low as possible for instance every Monday at 2 am PST.

The Overall score Leaderboard is checked, calculated and updated on a weekly basis (tweakable).

Every week the Supreme Commander of the week will be added to the Hall of Fame Leaderboard.

Decay Conditions:

To have the weekly amount of earned Career Points added to your total Career progress the player needs to fulfill these three criteria’s.
Reached the 40th rank Brigadier General
2000-5000 In A Round Score during the week (tweakable)
K/D Ratio of 1 - 2 (average during the previous week) (tweakable)
If the player doesn’t fulfill these criteria’s his Career points stays unchanged. (the weekly earned experience points plus In A Round Score are not added to his total Career progress)

Criteria:
Score/week K/D Ratio
Major General 50 players 2000 1
Lieutenant General 25 players 3000 1.5
Supreme Commander 1 player 5000 2

I hope that this answers your question. If you have any other questions, then by all means feel free to let us know. You can also refer to our extensive Self Help Knowledgebase at http://support.ea.com for common techincal questions.