(C)

1. (1) In determining whether spousal support is appropriate and reasonable, and in determining the nature, amount, and terms of payment, and duration of spousal support, which is payable either in gross or in installments, the court shall consider all of the following factors:

   1. (a) The income of the parties, from all sources, including, but not limited to, income derived from property divided, disbursed, or distributed under section 3105.171 of the Revised Code;
   2. (b) The relative earning abilities of the parties;
   3. (c) The ages and the physical, mental, and emotional conditions of the parties;
   4. (d) The retirement benefits of the parties;
   5. (e) The duration of the marriage;
   6. (f) The extent to which it would be inappropriate for a party, because that party will be custodian of a minor child of the marriage, to seek employment outside the home;
   7. (g) The standard of living of the parties established during the marriage;
   8. (h) The relative extent of education of the parties;
   9. (i) The relative assets and liabilities of the parties, including but not limited to any court-ordered payments by the parties;
   10. (j) The contribution of each party to the education, training, or earning ability of the other party, including, but not limited to, any party's contribution to the acquisition of a professional degree of the other party;
   11. (k) The time and expense necessary for the spouse who is seeking spousal support to acquire education, training, or job experience so that the spouse will be qualified to obtain appropriate employment, provided the education, training, or job experience, and employment is, in fact, sought;
   12. (l) The tax consequences, for each party, of an award of spousal support;
   13. (m) The lost income production capacity of either party that resulted from that party's marital responsibilities;
   14. (n) Any other factor that the court expressly finds to be relevant and equitable.
2. (2) In determining whether spousal support is reasonable and in determining the amount and terms of payment of spousal support, each party shall be considered to have contributed equally to the production of marital income.

(E) If a continuing order for periodic payments of money as alimony is entered in a divorce or dissolution of marriage action that is determined on or after May 2, 1986, and before January 1, 1991, or if a continuing order for periodic payments of money as spousal support is entered in a divorce or dissolution of marriage action that is determined on or after January 1, 1991, the court that enters the decree of divorce or dissolution of marriage does not have jurisdiction to modify the amount or terms of the alimony or spousal support unless the court determines that the circumstances of either party have changed and unless one of the following applies:

1. (1) In the case of a divorce, the decree or a separation agreement of the parties to the divorce that is incorporated into the decree contains a provision specifically authorizing the court to modify the amount or terms of alimony or spousal support.
2. (2) In the case of a dissolution of marriage, the separation agreement that is approved by the court and incorporated into the decree contains a provision specifically authorizing the court to modify the amount or terms of alimony or spousal support.

(F)

1. (1) For purposes of divisions (D) and (E) of this section and subject to division (F)(2) of this section, a change in the circumstances of a party includes, but is not limited to, any increase or involuntary decrease in the party's wages, salary, bonuses, living expenses, or medical expenses, or other changed circumstances so long as both of the following apply:

   1. (a) The change in circumstances is substantial and makes the existing award no longer reasonable and appropriate.
   2. (b) The change in circumstances was not taken into account by the parties or the court as a basis for the existing award when it was established or last modified, whether or not the change in circumstances was forseeable.
2. (2) In determining whether to modify an existing order for spousal support, the court shall consider any purpose expressed in the initial order or award and enforce any voluntary agreement of the parties. Absent an agreement of the parties, the court shall not modify the continuing jurisdiction of the court as contained in the original decree.