K1JT Joeさんからの返信メール、そのまま貼り付けます。
Conventional working frequencies for the various JT modes are determined by users.
When there is good consensus that certain frequencies are desirable we include them in WSJT-X as defaults. Decisions about new working frequencies must be made by the world-wide user community.
ｺﾒﾝﾄをする