You may use this form for up to 2 memberships of people residing at the same address. Membership fee must be included for each person unless you are choosing a Partner or Associate level membership. (Ex: Household includes 1 person 65 or older + 1 Individual under 65 - Choose "1" in the quantity area for Senior Individual & "1" for Individual. For 2 people 65 & older choose "2" in the quantity area for Senior Individual. Etc. It does not matter who is listed as Primary & who is listed as Additional Person).
Partner and Associate levels include membership for an additional person, no additional fee required. All you need to do is fill in the additional person's information.