Dispenation for non-Catholic bridegroom to receive Holy Communion?

[NOtard]

Can anyone help me with this "who cannot approach a minister of their own community and on their own ask for it?" Translation?

I would imagine it applies to someone in exile in Siberia (on a base in Antarctica? Mars colony?) -- anyway, totally isolated, and a Catholic priest is available but one of their own is not, and the dying person asks the Catholic priest for the sacraments.