אבן העזר קמ״גEven HaEzer 143

Se’if 1א׳

הַמְגָרֵשׁ עַל תְּנַאי, אִם נִתְקַיֵּם הַתְּנַאי הֲרֵי זוֹ מְגֹרֶשֶׁת; וְאִם לֹא נִתְקַיֵּם הַתְּנַאי, אֵינָהּ מְגֹרֶשֶׁת; וַאֲפִלּוּ הוּא כֹּהֵן, מֻתֶּרֶת לוֹ. וּכְבָר נִתְבָּאֲרוּ מִשְׁפְּטֵי הַתְּנָאִים בְּסִימָן ל"ח:

If a divorce was conditional, then if the condition was fulfilled, she is divorced, and if the condition is not fulfilled, she is not divorced. [If the condition was not fulfilled] she remains permitted to her husband even if he is a priest (who is forbidden to marry a divorcee). The rules of conditions are discussed in chapter 38.

Se’if 2ב׳

הַמְגָרֵשׁ עַל הַתְּנַאי, כְּשֶׁיִּתְקַיֵּם הַתְּנַאי תִּהְיֶה מְגֹרֶשֶׁת; בְּשָׁעָה שֶׁיִּתְקַיֵּם, לֹא בִּשְׁעַת נְתִינַת הַגֵּט לְיָדָהּ. לְפִיכָךְ, יֵשׁ לַבַּעַל לְבַטֵּל הַגֵּט, אוֹ לְהוֹסִיף עַל תְּנָאוֹ, אוֹ לְהַתְנוֹת תְּנַאי אַחֵר, כָּל זְמַן שֶׁלֹּא נִתְקַיֵּם הַתְּנַאי הָרִאשׁוֹן, אַף עַל פִּי שֶׁהִגִּיעַ לְיָדָהּ. וְאִם מֵת הַבַּעַל, אוֹ אָבַד הַגֵּט, אוֹ נִשְׂרַף, קֹדֶם שֶׁיִּתְקַיֵּם הַתְּנַאי, אֵינָהּ מְגֹרֶשֶׁת; וְאִם נִשֵּׂאת, תֵּצֵא. וְאִם אָמַר לָהּ: הֲרֵי אַתְּ מְגֹרֶשֶׁת מֵעַכְשָׁו, אוֹ מֵהַיּוֹם, עַל תְּנַאי כָּךְ וְכָךְ, אוֹ שֶׁאָמַר לָהּ: הֲרֵי אַתְּ מְגֹרֶשֶׁת עַל מְנָת כָּךְ וְכָךְ וְעַיֵּן לְקַמָּן סִי' קמ"ד סָעִיף ד' דְּיֵשׁ אוֹמְרִים דְּעַל מְנָת לָאו כְּמֵעַכְשָׁו דָּמֵי, כְּשֶׁיִּתְקַיֵּם הַתְּנַאי, תִּהְיֶה מְגֹרֶשֶׁת מִשְּׁעַת נְתִינַת הַגֵּט לְיָדָהּ; לְפִיכָךְ, אֵינוֹ יָכוֹל לְבַטֵּל הַגֵּט וְלֹא לְהוֹסִיף עַל תְּנָאוֹ מִשֶּׁהִגִּיעַ לְיָדָהּ; וְאִם אָבַד אוֹ נִשְׂרַף, (וַאֲפִלּוּ מֵת הַבַּעַל) קֹדֶם שֶׁיִּתְקַיֵּם הַתְּנַאי, הֲרֵי זוֹ מְקַיֶּמֶת הַתְּנַאי אַחַר מוֹתוֹ, וּכְבָר נִתְגָּרְשָׁה מִשְּׁעַת נְתִינַת הַגֵּט לְיָדָהּ. וּלְכַתְּחִלָּה לֹא תִּנָּשֵׂא קֹדֶם קִיּוּם הַתְּנַאי, וְאִם נִשֵּׂאת, יִפְרשׁ מִמֶּנָּה עַד שֶׁיִּתְקַיֵּם הַתְּנַאי. וּמִיהוּ, בִּתְנַאי שֶׁהוּא בְּיָדָהּ, וְהוּא בְּשֵׁב וְאַל תַּעֲשֶׂה, לֹא חַיְשִׁינָן שֶׁמָּא תַּעֲבֹר עָלָיו, וּלְפִיכָךְ מֻתֶּרֶת לִנָּשֵׂא מִיָּד, בִּתְנַאי דְּעַל מְנָת אוֹ מֵעַכְשָׁו. וְיֵשׁ אוֹמְרִים דַּאֲפִלּוּ לֹא אָמַר: מֵעַכְשָׁו וְלֹא מֵהַיּוֹם וְלֹא עַל מְנָת, דִּינוֹ כְּאוֹמֵר: מֵהַיּוֹם, מִשּׁוּם דִּזְמַנּוֹ שֶׁל גֵּט מוֹכִיחַ עָלָיו, הִלְכָּךְ, אָזְלִינָן בָּהּ לְחֻמְרָא. וְיֵשׁ אוֹמְרִים דַּאֲפִלּוּ בִּתְנַאי דְּמֵעַכְשָׁו יָכוֹל לְבַטְּלוֹ, וְיֵשׁ לְהַחֲמִיר (עִטּוּר, וְכֵן מַשְׁמָע בְּהָרֹא"שׁ):

One who divorces his wife with a condition when she fulfills the condition, she will be divorced at the time the condition is fulfilled, and not at the time the get is given to her hand. Therefore, the husband can nullify the get or add an additional condition or he can make another condition the entire time that the original condition was not met, even though it arrived at her hand. And if her husband dies or the get is lost or burnt before the new condition is fulfilled, she is not divorced. And if she married, she needs to exit [the new marriage]. And if he says to her, you are divorced from now or from today on the condition of x and y, or you are divorced on the condition of x' and y' (see later 144: 4 and there are those who say that "on the condition" is not similar from "now"). When the condition is fulfilled, they were divorced from the time get was given to her hand. If it was lost or burnt (even if the husband died) but before he fulfilled the condition, then this fulfills the condition after his death, so they were already divorced from the time he gave her the get to her hand. Initially, she should not marry before the condition is met, but if she marries, he should separate from her, until the condition is met. However, with a condition that she can control and passively fulfill, we do not suspect that she will violate it. Therefore, she is allowed to marry immediately, on the condition or "from now". There are those who say even if he did not say "from now," and not "from today," and not "on condition," the law is as one who said "from today," because the time [written in] the get proves [his intention]. (There are those who say that even in the condition "from now", he is able to nullify, but there are those who are strict.) (Itor and that is what is implied in the Ros"h).

Se’if 3ג׳

אָמַר לָהּ: עַל מְנָת שֶׁתִּתְּנִי לִי מָאתַיִם זוּז מִכָּאן וְעַד שְׁלשִׁים יוֹם, וּמֵת בְּתוֹךְ הַשְּׁלשִׁים יוֹם, קֹדֶם שֶׁנְּתָנָתַם לוֹ, אֵינָהּ יְכוֹלָה לְקַיֵּם הַתְּנַאי, שֶׁאִם תִּתֵּן לְיוֹרְשָׁיו אֵינוֹ כְּלוּם, וְכֵיוָן שֶׁכֵּן, כֵּיוָן שֶׁשָּׁלְמוּ שְׁלשִׁים יוֹם וְלֹא נָתְנָה לוֹ, בָּטְלוּ הַגֵּרוּשִׁין וְחוֹלֶצֶת אוֹ מִתְיַבֶּמֶת. וְאִם אָמַר לָהּ: עַל מְנָת שֶׁתִּתְּנִי לִי מָאתַיִם זוּז, וְלֹא קָבַע לָהּ זְמַן, וּמֵת קֹדֶם שֶׁתִּתֵּן לוֹ, אַף עַל פִּי שֶׁאָבַד הַגֵּט אוֹ נִקְרַע קֹדֶם שֶׁיָּמוּת, הֲרֵי זוֹ לֹא תִּנָּשֵׂא לְזָר עַד שֶׁתַּחֲלֹץ:

He said to her "[I give you a get] on condition that you give to me two-hundred zuz from now until thirty days" and he dies in the middle of the thirty days before she gave to him [the two-hundred zuz] she is unable to fulfill the condition, because if she gives to his inheritors, it is considered null. Thus, because the 30 days have passed and she did not give him [the money], the divorce is nullified and she must undergo chalitza or yibum. If he said to her " [I give you a get] on condition that you give me two-hundred zuz and he does set a time [for the transaction to take place] and he dies before she gives him [the two-hundred zuz] even if the get was lost or ripped before he died, she should not marry another until chalitza is preformed.