the potlatch was illegal until the 1950s.

The 1950s was an age of enlightenment … things like prohibitions on dancing and ceremonies

Section 140 of the 1927 Indian Act:
_ "140. (1) Every Indian or other person who engages in, or assists in celebrating or encourages, either directly or indirectly, another to celebrate any Indian Festival, dance, or other ceremony of which the giving away or paying or giving back of money, goods or articles of any sort forms a part, or is a feature, whether such gift of money, goods or articles takes place before, at, or after the celebration of the same or who engages or assists in any celebration or dance of which the wounding or mutilation of the dead or living body of any human being or animal forms a part or is a feature, is guilty of an offence and is liable on summary conviction to imprisonment for a term not exceeding six months and not less than two months.

(3) Any Indian in the provinces of Manitoba, Saskatchewan, Alberta or British Columbia or in the Territories who participates in any Indian Dance outside the bounds of his own reserve, or who participates in any show, exhibition, performance, stampede or pageant in aboriginal costume without the consent of the Superintendent General or his authorized agent, and any person who induces or employs any Indian to take part in such dance, show, exhibition, performance, stampede or pageant, or induces any Indian to leave his reserve or employs any Indian for such a purpose, whether the dance, show, exhibition, stampede or pageant has taken place or nor, shall on summary conviction be liable to a penalty not exceeding twenty five dollars, or to imprisonment for one month, or to both penalty and imprisonment._"

and prohibitions on the purchasing or giving or selling of livestock and agricultural produce from or to Indians:

Section 120 of the 1930 Indian Act:
"120. Every person who buys or otherwise acquires from any Indian, or band or irregular band of Indians, in the province of Manitoba, Saskatchewan, or Alberta, or the Territories, any cattle or other animals or any grain, root crops or other produce or sells to any such Indian any goods or supplies, cattle or other animals contrary to the provisions of this Act, shall on summary conviction, be liable to a penalty not exceeding one hundred dollars, or to imprisonment for a term not exceeding three months, or to both.27 "

weren't repealed in the 1950s. If you got a University degree or practised as a professional (doctor, lawyer) or served in the armed forces, the government could revoke your Indian status. I think even the Irish and Scots would have thought that sucked.