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The bi-annual exception can currently be used by teams below the apron to sign a free agent to a contract starting at $3.29 million. Like the mid-level exception, the bi-annual exception can also be split among more than one player, and can be used to sign players for up to two years; raises were originally limited to 8% per year, but in the 2017 CBA are limited to 5%. This exception was referred to as the "$1 million exception" in the 1999 CBA, although it was valued at $1 million for only the first year of the agreement.
An example of the bi-annual exception was the Los Angeles Lakers' signing of Karl Malone to a contract before the 2003–04 season.
The exception was eliminated for teams above the tax apron following the 2011 NBA lockout as many high spending teams were using this as a tool to gain top paid players.
A team cannot use this exception in consecutive years; a team that used it in 2016–17 (under the 2011 CBA) cannot use it in 2017–18 (under the 2017 CBA). It also cannot be used by a team that has already used an MLE in the same season. Additionally, once a team uses the bi-annual exception, the tax apron becomes a hard salary cap for the remainder of that season.(wiki)