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SDGS Membership BenefitsMembership Levels have been kept as low as possible. Supporting levels of membership (with additional benefits) are available for those who desire to make a greater financial contribution to the Society. Supporting levels are tax-deductible according to the extent allowed by law. To join online, please continue to the online form.  |      | 
BASIC 
 Access to SDGS Members-Only areas: 
 * Two people residing at same address.  | 
SILVER 
 * Two people residing at the same address.  | GOLD 
 Plus 
 * Two people residing at the same address.  | PLATINUM 
 Plus 
 * Two people residing at the same address.  |