From the Washington state Department of State website:
Who can register as domestic partners?
To register as domestic partners, both partners must:
• Share a common residence
• Both be at least 18 years of age
• Not be married to, or in a registered domestic partnership with someone else
• Be capable of consenting to the domestic partnership
• Not be nearer kin than second cousin
• Not be a sibling, grandchild, aunt, uncle, niece or nephew to the other partner, and
• Either be:
o Of the same sex, or
o At least one partner must be at least 62 years of age.
However, beginning June 30, 2014, only persons 62 years of age or older will be able to register a domestic partnership.
As of February 2014, the state of Pennsylvania does not recognize domestic partnerships. However, three cities and a borough do: Philadelphia, Pittsburgh, Harrisburg and the Borough of State College. All three of these registries are voluntary and no one has to register if they don't want to.
The nearest major airport is Harrisburg International Airport (MDT / KMDT). This airport has international and domestic flights from Harrisburg, Pennsylvania and is about 19 driving miles from the center of Mechanicsburg, PA.
As of February 2014, the State of Pennsylvania does not offer domestic partnerships. However, some cities do. For registration requirements for domestic partnership in Pennsylvania cities, see the related questions.
Harrisburg International Airport (MDT / KMDT). This airport has international and domestic flights from Harrisburg, Pennsylvania and is about 14 road miles from the center of Elizabethtown, PA.
The registry is limited to same-sex couples who are residents of Milwaukee.
The registry is limited to same-sex couples only. There is no residency requirement.
The Mutual Commitment Registry is limited to residents of the City.
That depends on the reason why domestic partnership was denied. Many requirements for domestic partnership do not apply to legal marriage; for example, you must live together to register as domestic partners, but you are not required to live with your legal spouse. Some domestic partnership registries require that you be a government employee whereas there is no such requirement for marriage. If the reason domestic partnership was not possible is related to geography, employment or residency, then these barriers will not prevent you from marrying. You may, however, need to travel to another state to marry and your home state may not recognize that marriage.
The requirements are generally that you the parties be unmarried, live together, and be of sufficient age. Some domestic partnership registries are available only to same-sex couples, but some registries are also open to opposite-sex couples. Domestic partnership is not available in all jurisdictions, although many places do not require local residency to obtain a certificate.
Generally, domestic partnership is not a bar to marriage, even if it is with someone else. However, if your domestic partnership is with a statewide registry and is substantially equivalent to marriage, then some states may recognize your domestic partnership as a marriage. If that is the case, then you must dissolve your domestic partnership before you can marry another person.
In some places, you must complete an affidavit of domestic partnership and notarize it in order to register your partnership.
The registry is open to both same-sex and opposite sex couples. There is no residency requirement.