Containment Membrane — ruling 1

Containment Membrane can target and be attached to an untapped creature. It just won't have any effect until that creature becomes tapped.

Containment Membrane — ruling 2

The enchanted creature can still be untapped by other spells and abilities.

Containment Membrane — ruling 3

For some cards, surge represents only an alternative cost, a discount that applies if you or a teammate has cast another spell this turn. Other cards, like Reckless Bushwhacker, have additional abilities or effects if you paid the surge cost to cast the spell.

Containment Membrane — ruling 4

The other spell that you or a teammate cast can be one that's resolved, one that was countered, or (for instants with surge) one that's still on the stack.

Containment Membrane — ruling 5

If an instant or sorcery spell cast for its surge cost is copied, the copy is also considered to have had its surge cost paid.

Containment Membrane — ruling 6

Casting a spell for its surge cost doesn't change its mana cost or its mana value.

Containment Membrane : règles, fonctionnement et interactions (MTG)

Containment Membrane is one of those cards players keep asking about. Here is, in plain words, what its official text says, the rulings published by Wizards of the Coast, and the combos players actually run.

Official card text

Surge (You may cast this spell for its surge cost if you or a teammate has cast another spell this turn.) Enchant creature Enchanted creature doesn't untap during its controller's untap step.

How it works : Containment Membrane

Original English text — Wizards of the Coast / Scryfall

#1January 22, 2016· Wizards of the Coast
Containment Membrane can target and be attached to an untapped creature. It just won't have any effect until that creature becomes tapped.
No other card is named in this ruling.
#2January 22, 2016· Wizards of the Coast
The enchanted creature can still be untapped by other spells and abilities.
No other card is named in this ruling.
#3January 22, 2016· Wizards of the Coast
For some cards, surge represents only an alternative cost, a discount that applies if you or a teammate has cast another spell this turn. Other cards, like Reckless Bushwhacker, have additional abilities or effects if you paid the surge cost to cast the spell.
No other card is named in this ruling.
#4January 22, 2016· Wizards of the Coast
The other spell that you or a teammate cast can be one that's resolved, one that was countered, or (for instants with surge) one that's still on the stack.
No other card is named in this ruling.
#5January 22, 2016· Wizards of the Coast
If an instant or sorcery spell cast for its surge cost is copied, the copy is also considered to have had its surge cost paid.
No other card is named in this ruling.
#6January 22, 2016· Wizards of the Coast
Casting a spell for its surge cost doesn't change its mana cost or its mana value.
No other card is named in this ruling.