各位IAU会员：

现转发IAU秘书处关于提醒IAU会员对自己感兴趣的专业委员会进行注册的通知，通知见下文，敬请收阅注册。

特此转发
　　　　　　　　　　　　　　　　　　　　　　　　　中国天文学会秘书处
　　　　　　　　　　　　　　　　　　　　　　　　　　2015年4月30日

Dear Colleague,

After the recent approval of Commissions by the Executive Committee, to take effect at the end of the next General Assembly in Honolulu, now is the time to sign-up for these Commissions if you wish.

*You will find your personal Mi-Voice electronic voting instructions to sign-up for Commissions below.*

Just a few reminders, explanations, and definitions:

1) Signing-up for Commissions is not compulsory. We expect members to join Commissions only if they have a particular interest and/or commitment to them. Signing-up now will allow you to vote for the Commission Organizing Committees in the coming weeks.

2) However, after Honolulu, it will be possible to join or leave Commissions at any time, under two conditions:
   - notify the Commission Secretary and the IAU Secretariat (at iauinfos@iap.fr);
   - keep the total number of Commissions to three maximum.

(This procedure will be added to the IAU Working Rules.)

3) If you select a Commission in a given Division, but you're not already a member of that Division, your name will be automatically added to the membership of that Division.

4) The relations between Commissions and Divisions fall into three categories:

    - *Regular Commissions*: the Commission President is ex-officio a member of the Steering Committee of the Parent Division;

    - *Inter-Division Commissions*: the Commission President is ex-officio a member of the Steering Committee of the Primary Division, but not of the Parent Division(s) (in the ballot these Divisions are indicated as "B;A,C", with "B" being the Primary Division, and "A,C" the Parent Divisions);

    - *Cross-Division Commissions*: the Commission has ex-officio representatives in each of the Parent Division Steering Committees (these Commissions are noted "X").

More details about the votes for the members of the Commission Organizing Committees, and of the Division Steering Committees, will be communicated to you later.

We hope for strong, active and focused IAU Commissions. We also plan to issue a new Call for Proposals for Commissions in 2017, for EC approval at the GA2018 in Vienna.

Best wishes,

        Thierry Montmerle
        General Secretary
=====================================================================

*Mi-Voice electronic Sign-Up Instructions*:

We invite you to participate in the 'Sign-Up for the Post-GA Commissions 2015'.

*The deadline is: 15 May 2015, 23:59 Central European Summer Time (CEST = UTC+2)*

You first need to go to: https://www.mi-vote.com/

Please use your unique voting code to make your selection.

    *Your unique voting code is*: 1187674449

You may sign-up for 1 Commission up to a maximum of 3 by checking the boxes next to each choice. You may submit your choices right away.

You also have the option to click 'save' after selecting only 1 or 2 Commissions, and then return at a later time to choose others if you need.

However please note that this 'save' does not enter any votes, it simply saves your choices for you to submit at a later date. If you choose the 'save' option, please make sure you return to complete your submission and cast your vote.

You may cancel a choice for a Commission by clicking again on the cross sign.